The only thing that we know is that we know nothing - and that is the highest flight of human wisdom.

To all this, someone is sure to object that life ought to subject itself to reason, to which we will reply that nobody ought to do what he is unable to do, and life cannot subject itself to reason. "Ought, therefore can," some Kantian will retort. To which we shall demur: "Cannot, therefore ought not." And life cannot submit itself to reason, because the end of life is living and not understanding.

Every great study is not only an end in itself, but also a means of creating and sustaining a lofty habit of mind.

To sum up: it is wrong always, everywhere, and for anyone, to believe anything upon insufficient evidence. If a man, holding a belief which he was taught in childhood or persuaded of afterwards, keeps down and pushes away any doubts which arise about it in his mind, purposely avoids the reading of books and the company of men that call into question or discuss it, and regards as impious those questions which cannot easily be asked without disturbing it--the life of that man is one long sin against mankind.

You shall find, that there cannot be a greater spur to the attaining what you would have the eldest learn, and know himself, than to set him upon teaching it his younger brothers and sisters.

Nothing contributes more to nourish elevation of sentiments in a people, than the large and free character of their habitations.

We are born helpless. As soon as we are fully conscious we discover loneliness. We need others physically, emotionally, intellectually; we need them if we are to know anything, even ourselves. 

Now his principal doctrines were these. That atoms and the vacuum were the beginning of the universe; and that everything else existed only in opinion.

It seems to me that the current political task in a society like ours is to criticize the working of institutions that are apparently the most neutral and independent, to criticize these institutions and attack them in such a way that the political violence that exercises itself obscurely through them becomes manifest, so that one can fight against them.

On the whole, the scientist is better off if he collects his facts by accident, little by little, so he can study them before he tries to fit them into a jigsaw puzzle, This is how the late Tom Lethbridge came to arrive at his theories about other dimensions of reality. It is also how Guy Lyon Playfair came to develop his own theories about the nature of the poltergeist.

It is crazy to want what is impossible. And impossible for the wicked not to do so.

England has to fulfill a double mission in India: one destructive, the other regenerating - the annihilation of old Asiatic society, and the laying the material foundations of Western society in Asia... When a great social revolution shall have mastered the results of the bourgeois epoch... and subjected them to the common control of the most advanced peoples, then only will human progress cease to resemble that hideous, pagan idol, who would not drink the nectar but from the skulls of the slain.

But no wall can be erected against Fortune which she cannot take by storm; let us strengthen our inner defences. If the inner part be safe, man can be attacked, but never captured.

Philosophy is the science of truth.

Nonviolence is not an absolute principle, but an open-ended struggle with violence and its countervailing forces.

As the State formerly played a most important part in the revolutions that abolished the old economic systems, so it must again be the State that should abolish capitalism.

A life which does not go into action is a failure.

He who does not realize to what extent shifting fortune and necessity hold in subjection every human spirit, cannot regard as fellow-creatures nor love as he loves himself those whom chance separated from him by an abyss. The variety of constraints pressing upon man give rise to the illusion of several distinct species that cannot communicate.

Fortunately science, like that nature to which it belongs, is neither limited by time nor by space. It belongs to the world, and is of no country and of no age. The more we know, the more we feel our ignorance; the more we feel how much remains unknown; and in philosophy, the sentiment of the Macedonian hero can never apply, - there are always new worlds to conquer.

If I find in myself a desire which no experience in this world can satisfy, the most probable explanation is that I was made for another world.

A religious creed differs from a scientific theory in claiming to embody eternal and absolutely certain truth, whereas science is always tentative, expecting that modification in its present theories will sooner or later be found necessary, and aware that its method is one which is logically incapable of arriving at a complete and final demonstration.

Of the various executive abilities, no one excited more anxious concern than that of placing the interests of our fellow-citizens in the hands of honest men, with understanding sufficient for their stations. No duty is at the same time more difficult to fulfil. The knowledge of character possessed by a single individual is of necessity limited. To seek out the best through the whole Union, we must resort to the information which from the best of men, acting disinterestedly and with the purest motives, is sometimes incorrect.

In everything well known something worthy of thought still lurks.

I do not mean to be disrespectful, but the attempt of the Lords to stop the progress of reform reminds me very forcibly of the great storm at Sidmouth, and of the conduct of the excellent Mrs Partington on that occasion. In the winter of 1824 there set in a great flood upon that town - the tide rose to an incredible height - the waves rushed in upon the houses, and everything was threatened with destruction. In the midst of this sublime and terrible storm, Dame Partington, who lived upon the beach, was seen at the door of her house with mop and pattens, trundling her mop, squeezing out the sea-water, and vigorously pushing away the Atlantic Ocean. The Atlantic was roused; Mrs. Partington's spirit was up. But I need not tell you that the contest was unequal.

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.

I disclose my mysteries to those who are worthy of my mysteries.

The chief requirement of the good life... is to live without any image of oneself.

It is a rough road that leads to the heights of greatness.

All states in the world, large or small, are cities of Heaven, and all people, young or old, honourable or humble, are its subjects; for they all graze oxen and sheep, feed dogs and pigs, and prepare clean wine and cakes to sacrifice to Heaven. Does this not mean that Heaven claims all and accepts offerings from all? Since Heaven does claim all and accepts offerings from all, what then can make us say that it does not desire men to love and benefit one another? Hence those who love and benefit others Heaven will bless. Those who hate and harm others Heaven will curse, for it is said that he who murders the innocent will be visited by misfortune. How else can we explain the fact that men, murdering each other, will be cursed by Heaven? Thus we are certain that Heaven desires to have men love and benefit one another and abominates to have them hate and harm one another.

Change alone is eternal, perpetual, immortal.

From the fundamental nature of the Philistine, it follows that, in regard to others, as he has no intellectual but only physical needs, he will seek those who are capable of satisfying the latter not the former. And so of all the demands he makes of others the very smallest will be that of any outstanding intellectual abilities. On the contrary, when he comes across these they will excite his antipathy and even hatred. For here he has a hateful feeling of inferiority and also a dull secret envy which he most carefully attempts to conceal even from himself; but in this way it grows sometimes into a feeling of secret rage and rancour. Therefore it will never occur to him to assess his own esteem and respect in accordance with such qualities, but they will remain exclusively reserved for rank and wealth, power and influence, as being in his eyes the only real advantages to excel in which is also his desire.

Knowledge is employed in the service of the necessity of life and primarily in the service of the instinct of personal preservation. The necessity and this instinct have created in man the organs of knowledge and given them such capacity as they possess. Man sees, hears, touches, tastes and smells that which it is necessary for him to see, hear, touch, taste and smell in order to preserve his life. The decay or loss of any of these senses increases the risks with which his life is environed, and if it increases them less in the state of society in which we are actually living, the reason is that some see, hear, touch, taste and smell for others. A blind man, by himself and without a guide, could not live long. Society is an additional sense; it is the true common sense.

Thought is something limitless and independent, and has been mixed with no thing but is alone by itself. ... What was mingled with it would have prevented it from having power over anything in the way in which it does. ... For it is the finest of all things and the purest.

I seem to be a brief light that flashes but once in all the aeons of time - a rare, complicated, and all-too-delicate organism on the fringe of biological evolution, where the wave of life bursts into individual, sparkling, and multicolored drops that gleam for a moment... only to vanish forever.

We must not suppose any corporeal conjunction or marriage in the case - all which are merely the sportive fables of Poetry; but must hold the father and the producer of that Being as something most divine and super-eminent. Of such a nature is He who is above all things, around whom, and by reason of whom, all things do subsist. But Homer calls him by his father's name, "Hyperion," in order to show that he is independent, and not subjected to any constraint.

In some lyceums they tell me that they have voted to exclude the subject of religion. But how do I know what their religion is, and when I am near to or far from it? I have walked into such an arena and done my best to make a clean breast of what religion I have experienced, and the audience never suspected what I was about.

We learn history not in order to know how to behave or how to succeed, but to know who we are.

The organism does not have a point of view: the person or creature does.

When, in the course of human development, existing institutions prove inadequate to the needs of man, when they serve merely to enslave, rob, and oppress mankind, the people have the eternal right to rebel against, and overthrow, these institutions.

We are so lonely in life that we must ask ourselves if the loneliness of dying is not a symbol of our human existence.

The world is the totality of facts, not things.

He preferred an honest man that wooed his daughter, before a rich man. "I would rather," said Themistocles, "have a man that wants money than money that wants a man."

Pain and suffering are always inevitable for a large intelligence and a deep heart. The really great men must, I think, have great sadness on Earth.