Ether is, in effect, a merely hypothetical entity, valuable only in so far as it explains that which by means of it we endeavor to explain - light, electricity, or universal gravitation - and only so far as these facts cannot be explained in any other way. In like manner the idea of God is also an hypothesis, valuable only in so far as it enables us to explain that which by means of it we endeavor to explain - the essence and existence of the Universe - and only so long as these cannot be explained in any other way. And since in reality we explain the Universe neither better nor worse with this idea than without it, the idea of God, the supreme petitio principii, is valueless.

The first and the simplest emotion which we discover in the human mind is Curiosity.

The ethical stand of nonviolence has to be linked to a commitment to radical equality. And more specifically, the practice of nonviolence requires an opposition to biopolitical forms of racism and war logics that regularly distinguish lives worth safeguarding from those that are not-populations conceived as collateral damage, or as obstructions to policy and military aims.

Skepticism is the chastity of the intellect, and it is shameful to surrender it too soon or to the first comer: there is nobility in preserving it coolly and proudly through long youth, until at last, in the ripeness of instinct and discretion, it can be safely exchanged for fidelity and happiness.

Do not be afraid. I am the First and the Last, and the living one, and I became dead, but look! I am living forever and ever, and I have the keys of death and of the Grave.

Intolerance is the besetting sin of moral fervour.

Tis not sufficient to combine well-chosen words in a well-ordered line.

Decision making processes are aimed at finding courses of action that are feasible or satisfactory in the light of multiple goals and constraints.

God, our Father, has given us the life and the art of healing to protect and maintain it.

Human beings can lose their lives in libraries. They ought to be warned.

Knowledge is not so precise a concept as is commonly thought. Instead of saying "I know this," we ought to say "I more or less know something more or less like this." It is true that this proviso is hardly necessary as regards the multiplication table, but knowledge in practical affairs has not the certainty or the precision of arithmetic. Suppose I say "democracy is a good thing": I must admit, first, that I am less sure of this than I am that two and two are four, and secondly, that "democracy" is a somewhat vague term which I cannot define precisely. We ought to say, therefore: "I am fairly certain that it is a good thing if a government has something of the characteristics that are common to the British and American Constitutions," or something of this sort. And one of the aims of education ought to be to make such a statement more effective from a platform than the usual type of political slogan.

No one is able to rule unless he is also able to be ruled.

He whom God has touched will always be a being apart: he is, whatever he may do, a stranger among men; he is marked by a sign.

As iron is eaten away by rust, so the envious are consumed by their own passion.

That's... the crisis. The number of liberal democracies measured by... Freedom House in its annual survey of freedom around the world has been in decline for 16 straight years, and the biggest declines recently have been in the two biggest liberal democracies, India and the United States. So... we're dealing with a big global problem.

Whatever my own practice may be, I have no doubt that it is a part of the destiny of the human race, in its gradual improvement, to leave off eating animals, as surely as the savage tribes have left off eating each other when they came in contact with the more civilized.

There is only one inborn erroneous notion ... that we exist in order to be happy ... So long as we persist in this inborn error ... the world seems to us full of contradictions. For at every step, in great things and small, we are bound to experience that the world and life are certainly not arranged for the purpose of maintaining a happy existence ... hence the countenances of almost all elderly persons wear the expression of ... disappointment.

The only certain fact about Russian affairs under the Soviet regime with regard to which all people agree is: that the standard of living of the Russian masses is much lower than ... the paragon of capitalism, the United States of America. If we were to regard the Soviet regime as an experiment, we would have to say that the experiment has clearly demonstrated the superiority of capitalism and the inferiority of socialism.

The individual who is subordinate to an objective law feels himself determined by it, while he, in turn, in no way determines the law, and has no possibility of reacting to it in a manner which could influence it-quite in contrast to even the most miserable slave, who, in some fashion at last, can still in this sense react to his master.

We cannot overstate our debt to the Past, but the moment has the supreme claim. The Past is for us; but the sole terms on which it can become ours are its subordination to the Present. Only an inventor knows how to borrow, and every man is or should be an inventor. We must not tamper with the organic motion of the soul.

The argument of this book is that we, and all other animals, are machines created by our genes.

That some have never dreamed is as improbable as that some have never laughed.

Whenever you say anything good about East Germany, immediately somebody jumps up and says, "My God, you're a Stalinist..." I'm not defending everything about it, of course. But I laboured on the chapter that talks about the east. I fact-checked it; I had somebody else fact-check it. I knew that I was going to get a lot of flak for that. But in the beginning, East Germany did a better job. They just did.

To turn one's eyes away from Jesus means to turn them to the Law.

The heathen really make their self-invented notions and dreams of God and idol. Ultimately, they put their trust in that which is nothing. So it is with all idolatry. For it happens not merely by erecting an image and worshipping it, but rather it happens in the heart. For the heart seeks help and consolation from creatures, saints, or devils. It neither cares for God, nor looks to Him for anything better than to believe that He is willing to help.

Americans combine to give fêtes, found seminaries, build churches, distribute books, and send missionaries to the antipodes. Hospitals, prisons, and schools take shape in that way. Finally, if they want to proclaim a truth or propagate some feeling by the encouragement of a great example, they form an association. In every case, at the head of any new undertaking, where in France you would find the government or in England some territorial magnate, in the United States you are sure to find an association. I have come across several types of association in America of which, I confess, I had not previously the slightest conception, and I have often admired the extreme skill they show in proposing a common object for the exertions of very many and in inducing them voluntarily to pursue it.

Deep within every human being there still lives the anxiety over the possibility of being alone in the world, forgotten by God, overlooked among the millions and millions in this enormous household. One keeps this anxiety at a distance by looking at the many round about who are related to him as kin and friends, but the anxiety is still there, nevertheless, and one hardly dares think of how he would feel if all this were taken away.

At bottom, as was said above, we are to consider Luther as a Prophet Idol-breaker; a bringer-back of men to reality. It is the function of great men and teachers.

What would really satisfy us would be a God who said of anything we happened to like, "What does it matter so long as they are contented?" We want, in fact, not so much a Father in Heaven as a grandfather in heaven - a senile benevolence who, as they say, "liked to see young people enjoying themselves" and whose plan for the universe was simply that it might be truly said at the end of each day, "a good time was had by all".

The value of life lies not in the length of days, but in the use we make of them... Whether you find satisfaction in life depends not on your tale of years, but on your will.

The pleasures of the imagination are as it were only drawings and models which are played with by poor people who cannot afford the real thing.

World,-this man is not a slave with thee! None of thy promotions is necessary for him. His place is with the stars of Heaven: to thee it may be momentous, to him it is indifferent, whether thou place him in the lowest hut, or forty feet higher at the top of thy stupendous high tower, while here on Earth. The joys of Earth that are precious, they depend not on thee and thy promotions. Food and raiment, and, round a social hearth, souls who love him, whom he loves: these are already his. He wants none of thy rewards;

I have only one real message in this lecture, and that is: consciousness is a biological phenomenon, like photosynthesis, digestion, mitosis-you know all the biological phenomena-and once you accept that, most, if not all about the hard problems of consciousness simply evaporate.

A hymn is the praise of God with song; a song is the exultation of the mind dwelling on eternal things, bursting forth in the voice.

In theory there is nothing to hinder our following what we are taught; but in life there are many things to draw us aside.

I am amazed that Congressmen can pass a bill imposing severe penalties on anyone who burns the American flag, whereas they are responsible for burning that for which the flag stands: the United States as a territory, as a people, and as a biological manifestation. That is an example of our perennial confusion of symbols with realities.

Are we not madder than those first inhabitants of the plain of Sennar? We know that the distance separating the earth from the sky is infinite, and yet we do not stop building our tower.

Formerly, it was held by philosophers and mathematicians alike that the proofs in Geometry depended on the figure; nowadays, this is known to be false. In the best books there are no figures at all. The reasoning proceeds by the strict rules of formal logic from a set of axioms laid down to begin with.

Neoconservatives believed that history can be pushed along with the right application of power and will. Leninism was a tragedy in its Bolshevik version, and it has returned as farce when practiced by the United States. Neoconservatism, as both a political symbol and a body of thought, has evolved into something I can no longer support. ..."War" is the wrong metaphor for the broader struggle, since wars are fought at full intensity and have clear beginnings and endings. Meeting the jihadist challenge is more of a "long, twilight struggle" whose core is not a military campaign but a political contest for the hearts and minds of ordinary Muslims around the world.

Reorganisation, irrespectively of God or king, by the worship of Humanity, systematically adopted. Man's only right is to do his duty. The Intellect should always be the servant of the Heart, and should never be its slave.

The student of mathematics often finds it hard to throw off the uncomfortable feeling that his science, in the person of his pencil, surpasses him in intelligence,-an impression which the great Euler confessed he often could not get rid of. This feeling finds a sort of justification when we reflect that the majority of the ideas we deal with were conceived by others, often centuries ago. In a great measure it is really the intelligence of other people that confronts us in science.

We define only out of despair, we must have a formula... to give a facade to the void.

He who can buy bravery is brace, though a coward. As money is not exchanged for anyone specific quality, for any one specific thing, or for any particular human essential power, but for the entire objective world of man and nature, from the standpoint of its possessor it therefore serves to exchange every property for every other, even contradictory, property and object: it is the fraternization of impossibilities. It makes contradictions embrace.

If you don't want to explode with rage, leave your memory alone, abstain from burrowing there.

Simplify the social system, in the manner which every motive, but those of usurpation and ambition, powerfully recommends; render the plain dictates of justice level to every capacity; remove the necessity of implicit faith; and we may expect the whole species to become reasonable and virtuous.

There is no fundamental biological reason why the human genome can't be rewritten to allow everyone to be "in" love with everyone else - if we should so choose. But simply loving each other will be miraculous enough; and will probably suffice. An empty religious piety can be transformed into a biological reality. 

In the general tendency toward specialization, philosophy too has established itself as a specialized discipline, one purified of all specific content. In so doing, philosophy has denied its own constitutive concept: the intellectual freedom that does not obey the dictates of specialized knowledge.