Follow your desire as long as you live and do not perform more than is ordered; do not lessen the time of following desire, for the wasting of time is an abomination to the spirit... When riches are gained, follow desire, for riches will not profit if one is sluggish.

Be cheerful while you are alive.

The pleasure is only for a little moment, and it [passes] like a dream, and a man at the end thereof finds death through knowing it.

Be a craftsman in speech that thou mayest be strong, for the strength of one is the tongue, and speech is mightier than all fighting.

Beware an act of avarice; it is bad and incurable disease.

If you are well-to-do and can maintain your household, love your wife in your home according to good custom...Make her happy while you are alive, for she is land profitable to her lord.

Teach him what has been said in the past; then he will set a good example to the children of the magistrates, and judgement and all exactitude shall enter into him. Speak to him, for there is none born wise.

Do not repeat slander; you should not hear it, for it is the result of hot temper.

Do not be arrogant because of your knowledge, but confer with the ignorant man as with the learned. For knowledge has no limits, and none has yet achieved perfection in it. Good speech is more hidden than malachite, yet it is found in the possession of women slaves at the millstones.

The only justifiable stopping place for the expansion of altruism is the point at which all whose welfare can be affected by our actions are included within the circle of altruism. This means that all beings with the capacity to feel pleasure or pain should be included; we can improve their welfare by increasing their pleasures and diminishing their pains.

Animal Liberation is Human Liberation too.

Remember Bostrom's definition of existential risk, which refers to the annihilation not of human beings, but of "Earth-originating intelligent life." The replacement of our species by some other form of conscious intelligent life is not in itself, impartially considered, catastrophic. Even if the intelligent machines kill all existing humans, that would be...a very small part of the loss of value that Parfit and Bostrom believe would be brought about by the extinction of Earth-originating intelligent life. The risk posed by the development of AI, therefore, is not so much whether it is friendly to us, but whether it is friendly to the idea of promoting wellbeing in general, for all sentient beings it encounters, itself included.

The core of ethics runs deep in our species and is common to human beings everywhere. It survives the most appalling hardships and the most ruthless attempts to deprive human beings of their humanity. Nevertheless, some people resist the idea that his core has a biological basis which we have inherited from our pre-human ancestors.

Speciesism is an attitude of prejudice towards beings because they're not members of our species, so just as racism means that you're prejudiced against beings who are not members of your race and sexism means you're prejudiced against people of the other sex. So we humans tend to be speciesist in we think that any being that is a member of the species homo sapien just automatically has a higher moral status and is more important than any being that is a member of any other species, irrespective of the actual characteristics of those beings.

We are responsible not only for what we do but also for what we could have prevented.

Those who claim to care about the wellbeing of human beings and the preservation of our environment should become vegetarians for that reason alone. They would thereby increase the amount of grain available to feed people elsewhere, reduce pollution, save water and energy, and cease contributing to the clearing of forests; moreover, since a vegetarian diet is cheaper than one based on meat dishes, they would have more money available to devote to famine relief, population control, or whatever social or political cause they thought most urgent. ... when nonvegetarians say that "human problems come first" I cannot help wondering what exactly it is that they are doing for human beings that compels them to continue to support the wasteful, ruthless exploitation of farm animals.

Some of Singer's critics call him a Nazi and compare his proposals to Hitler's schemes for eliminating the unwanted, the unfit and the disabled. But...Singer is no Hitler. He doesn't want state-sponsored killings. Rather, he wants the decision to kill to be made by you and me. Instead of government-conducted genocide, Singer favors free-market homicide.

Since ancient times, philosophers have maintained that to strive too hard for one's own happiness is self-defeating.

Speciesism-the word is not an attractive one, but I can think of no better term-is a prejudice or attitude of bias in favor of the interests of members of one's own species and against those of members of other species.

One common strategy on which we should all be able to agree is to take steps to reduce the risk of human extinction when those steps are also highly effective in benefiting existing sentient beings. For example, eliminating or decreasing the consumption of animal products will benefit animals, reduce greenhouse gas emissions, and lessen the chances of a pandemic resulting from a virus evolving among the animals crowded into today's factory farms, which are an ideal breeding ground for viruses. That therefore looks like a high-priority strategy.

Herbert Spencer is little read now. Philosophers do not regard him as a major thinker.

Philosophy is not politics, and we do our best, within our all-too-human limitations, to seek the truth, not to score points against opponents. There is little satisfaction in gaining an easy triumph over a weak opponent while ignoring better arguments against your views. 

When my ability to reason shows me that the suffering of another being is very similar to my own suffering and matters just as much to that other being as my own suffering matters to me, then my reason is showing me something that is undeniably true. ... The perspective on ourselves that we get when we take the point of view of the universe also yields as much objectivity as we need if we are to find a cause that is worthwhile in a way that is independent of our own desires. The most obvious such cause is the reduction of pain and suffering, wherever it is to be found.

The animals themselves are incapable of demanding their own liberation, or of protesting against their condition with votes, demonstrations, or boycotts. Human beings have the power to continue to oppress other species forever, or until we make this planet unsuitable for living beings. Will our tyranny continue, proving that morality counts for nothing when it clashes with selfinterest, as the most cynical of poets and philosophers have always said? Or will we rise to the challenge and prove our capacity for genuine altruism by ending our ruthless exploitation of the species in our power, not because we are forced to do so by rebels or terrorists, but because we recognize that our position is morally indefensible? The way in which we answer this question depends on the way in which each one of us, individually, answers it.

At one level, this movement on behalf of oppressed farm animals is emotional...Yet the movement is also the product of a deep intellectual ferment pioneered by the Princeton scholar Peter Singer...This idea popularized by Professor Singer - that we have ethical obligations that transcend our species - is one whose time appears to have come...What we're seeing now is an interesting moral moment: a grass-roots effort by members of one species to promote the welfare of others...animal rights are now firmly on the mainstream ethical agenda.

The principles of ethics come from our own nature as social, reasoning beings.

Let us consider first the view that it is always wrong to take an innocent human life. We may call this the "sanctity of life" view. People who take this view oppose abortion and euthanasia. They do not usually, however, oppose the killing of nonhuman animals-so perhaps it would be more accurate to describe this view as the "sanctity of human life" view. The belief that human life, and only human life, is sacrosanct is a form of speciesism.

September 11, 2001, was just another day for most of the world's desperately poor people, so presumably close to 30,000 children under five died from these causes on that day-about ten times the number of victims of the terrorist attacks. The publication of these figures did not lead to an avalanche of money for UNICEF or other aid agencies helping to reduce infant mortality. In the year 2000 Americans made private donations for foreign aid of all kinds totaling about $4 per person in extreme poverty, or roughly $20 per family. New Yorkers who were living in lower Manhattan on September 11, 2001, whether wealthy or not, were able to receive an average of $5,300 per family. The distance between these amounts encapsulates the way in which, for many people, the circle of concern for others stops at the boundaries of their own country-if it extends even that far.

Everyday we act in ways that reflect our ethical judgements.

I never believed in a God. [...] There may have been times when I wondered if there might be a God, but it always seemed to me wildly implausible that a God worth worshipping could allow the Holocaust to occur.

When we make ethical judgments, we must go beyond a personal or sectional point of view and take into account the interests of all those affected, unless we have sound ethical grounds for doing otherwise. (...) The essence of the principle of equal consideration of interests is that we give equal weight in our moral deliberations to the like interests of all those affected by our actions. (...) an interest is an interest, whoever's interest it may be.

It is now generally accepted that the roots of our ethics lie in patterns of behavior that evolved among our pre-human ancestors, the social mammals and that we retain within our biological nature elements of these evolved responses. We have learned considerably more about these responses, and we are beginning to to understand how they interact with our capacity to reason.

The goal of maximizing the welfare of all may be better achieved by an ethic that accepts our inclinations and harnesses them so that, taken as a whole, the system works to everyone's advantage.

[One thing] underpins, makes consistent, and gives meaning to all our other activities on behalf of animals. This one thing is that we take responsibility for our own lives, and make them as free of cruelty as we can. The first step is that we cease to eat animals. Many people who are opposed to cruelty to animals draw the line at becoming a vegetarian. It was of such people that Oliver Goldsmith, the eighteenth-century humanitarian essayist, wrote: "They pity, and they eat the objects of their compassion."

Animals no doubt have different interests from humans, and may experience different pleasures and pains, but the principle of equal consideration for similar interests still holds, and pleasures and pains of similar intensity and duration should be given equal weight, whether they are experienced by humans or by animals.

The capacity to reason is a special sort of capacity because it can lead us to places that we did not expect to go.

If it is in our power to prevent something bad from happening, without thereby sacrificing anything of comparable moral importance, we ought, morally, to do it.

It is easy for us to criticize the prejudices of our grandfathers, from which our fathers freed themselves. It is more difficult to search for prejudices among the beliefs and values that we hold.

Ethics is inescapable.

I am a utilitarian. I am also a vegetarian. I am a vegetarian because I am a utilitarian.

Ethics seems a morass which we have to cross, but get hopelessly bogged in when we make the attempt.

Becoming a vegetarian is not merely a symbolic gesture. Nor is it an attempt to isolate oneself from the ugly realities of the world, to keep oneself pure and so without responsibility for the cruelty and carnage all around. Becoming a vegetarian is a highly practical and effective step one can take toward ending both the killing of nonhuman animals and the infliction of suffering upon them.

The fact that no one has come up with a really convincing reason for giving greater moral weight to members of our own species, simply because they are members of our species, strongly suggests that there is no such reason. Like racism and sexism, speciesism is wrong.

Beginning to reason is like stepping onto an escalator that leads upward and out of sight. Once we take the first step, the distance to be traveled is independent of our will and we cannot know in advance where we shall end.

Neither our distance from a preventable evil nor the number of other people who, in respect to that evil, are in the same situation as we are, lessens our obligation to mitigate or prevent that evil.

Living a minimally acceptable ethical life involves using a substantial part of our spare resources to make the world a better place. Living a fully ethical life involves doing the most good we can.

Human beings are social animals. We were social before we were human.

To be honest, I was somewhat disappointed... It's had effects around the margins, of course, but they have mostly been minor. When I wrote it, I really thought the book would change the world. I know it sounds a little grand now, but at the time the sixties still existed for us. It looked as if real changes were possible, and I let myself believe that this would be one of them. All you have to do is walk around the corner to McDonald's to see how successful I have been.

Human social institutions can effect the course of human evolution. Just as climate-change, food supply, predators, and other natural forces of selection have molded our nature, so too can our culture.

To protest about bullfighting in Spain, the eating of dogs in South Korea, or the slaughter of baby seals in Canada while continuing to eat eggs from hens who have spent their lives crammed into cages, or veal from calves who have been deprived of their mothers, their proper diet, and the freedom to lie down with their legs extended, is like denouncing apartheid in South Africa while asking your neighbors not to sell their houses to blacks.