But love for an object eternal and infinite feeds the mind with joy alone, and a joy which is free from all sorrow. This is something greatly to be desired and to be sought with all our strength.

What has philosophy got to do with measuring anything? It's the mathematicians you have to trust, and they measure the skies like we measure a field.

We have now but to prove a third attribute: I mean the faculty of feeling which the philosophers of all centuries have found in this same substance. ...The Cartesians have made, in vain, to rob matter of this faculty. But in order to avoid insurmountable difficulties, they have flung themselves into a labyrinth from which they have thought to escape by this absurd system "that animals are pure machines."An opinion so absurd has never gained admittance among philosophers... Experience gives us no less proof of the faculty of feeling in animals than of feeling in men.

Nonviolence has now to be understood less as a moral position adopted by individuals in relation to a field of possible action than as a social and political practice undertaken in concert, culminating in a form of resistance to systemic forms of destruction coupled with a commitment to world building that honors global interdependency of the kind that embodies ideals of economic, social, and political freedom and equality.

...what the freedom is that I love, and that to which I think all men intitled. It is not solitary, unconnected, individual, selfish Liberty. As if every Man was to regulate the whole of his Conduct by his own will. The Liberty I mean is social freedom. It is that state of things in which Liberty is secured by the equality of Restraint; A Constitution of things in which the liberty of no one Man, and no body of Men and no Number of men, can find Means to trespass on the liberty of any Person, or any description of Persons in the Society. This kind of liberty is indeed but another name for Justice, as ascertained by wise Laws, and secured by well-constructed institutions.

For he who is unmusical is a child in music; he who is without letters is a child in learning; he who is untaught, is a child in life.

When we cannot obtain a thing, we comfort ourselves with the reassuring thought that it is not worth nearly as much as we believed.

All of us need an identity which unites us with our neighbours, our countrymen, those people who are subject to the same rules and the same laws as us, those people with whom we might one day have to fight side by side to protect our inheritance, those people with whom we will suffer when attacked, those people whose destinies are in some way tied up with our own.

And see, a kind, refined lady will devour the carcasses of these animals with full assurance that she is doing right, at the same time asserting two contradictory propositions: First, that she is, as her doctor assures her, so delicate that she cannot be sustained by vegetable food alone, and that for her feeble organism flesh is indispensable; and, secondly, that she is so sensitive that she is unable, not only herself to inflict suffering on animals, but even to bear the sight of suffering. Whereas the poor lady is weak precisely because she has been taught to live upon food unnatural to man; and she cannot avoid causing suffering to animals - for she eats them.

Talking nonsense is man's only privilege that distinguishes him from all other organisms.

The music that can deepest reach, And cure all ill, is cordial speech.

It is an understatement to say that in this society injustices abound: in truth, it is itself the quintessence of injustice.

Tears do not burn except in solitude.

To think is to run after insecurity, to be demoralized for grandiose trifles, to immure oneself in abstractions with a martyr's avidity, to hunt up complications the way others pursue collapse or gain. The thinker is by definition keen for torment.

In the United States, except for slaves, servants and the destitute fed by townships, everyone has the vote and this is an indirect contributor to law-making. Anyone wishing to attack the law is thus reduced to adopting one of two obvious courses: they must either change the nation's opinion or trample its wishes under foot.

If the true is what is grounded, then the ground is not true, nor yet false.

The soldier is applauded who refuses to serve in an unjust war by those who do not refuse to sustain the unjust government which makes the war; is applauded by those whose own act and authority he disregards and sets at naught; as if the state were penitent to that degree that it hired one to scourge it while it sinned, but not to that degree that it left off sinning for a moment.

The most taboo issue on U.S. campuses these days, in many instances, has to do with the vicious Israeli occupation of precious Palestinians. It's very difficult to have a respectful, robust conversation about that. And I am unequivocal in my solidarity with Palestinian brothers and sisters... I'm not in any way going to stop talking about the Palestinian plight and predicament.

To my complete surprise, that exposure to out-of-date scientific theory and practice radically undermined some of my basic conceptions about the nature of science and the reasons for its special success.Those conceptions were ones I had previously drawn partly from scientific training itself and partly from a long-standing avocational interest in the philosophy of science. Somehow, whatever their pedagogic utility and their abstract plausibility, those notions did not at all fit the enterprise that historical study displayed. Yet they were and are fundamental to many discussions of science, and their failures of verisimilitude therefore seemed thoroughly worth pursuing. The result was a drastic shift in my career plans, a shift from physics to history of science and then, gradually, from relatively straightforward historical problems back to the more philosophical concerns that had initially led me to history.

I am enough of an artist to draw freely upon my imagination. Imagination is more important than knowledge. Knowledge is limited. Imagination encircles the world.

Ideally a just constitution would be a just procedure arranged to insure a just outcome.

As the French say, there are three sexes - men, women, and clergymen.

These two states which it is necessary to know together in order to see the whole truth, being known separately, lead necessarily to one of these two vices, pride or indolence, in which all men are invariably led before grace, since if they do not remain in their disorders through laxity, they forsake them through vanity, so true is that which you have just repeated to me from St. Augustine, and which I find to a great extent; for in fact homage is rendered to them in many ways.

I regard religion as a disease born of fear and as a source of untold misery to the human race.

So potent was Religion in persuading to do wrong.

Legal and economic equality are absolutely necessary remedies for the Fall, and protection against cruelty.

There is no passion so contagious as that of fear.

The sense of justice and injustice is not deriv'd from nature, but arises artificially... from education, and human conventions.

FREEDOM, the realization of freedom: who can deny that this is what today heads the agenda of history? ... Revolutionary propaganda is in its deepest sense the negation of the existing conditions of the State, for, with respect to its innermost nature, it has no other program than the destruction of whatever order prevails at the time.... We must not only act politically, but in our politics act religiously, religiously in the sense of freedom, of which the one true expression is justice and love. Indeed, for us alone, who are called the enemies of the Christian religion, for us alone it is reserved, and even made the highest duty ... really to exercise love, this highest commandment of Christ and this only way to true Christianity. 

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If you are a man of learning, fight in the skull, kill ideas and create new ones. God hides in every idea as in every cell of flesh. Smash the idea, set him free! Give him another, a more spacious idea in which to dwell.

Since it is always the same person whose mind thinks, wills, and judges, the autonomous nature of these activities has created great difficulties. Reason's inability to move the will, plus the fact that thinking can only "understand" what is past what neither remove it nor "rejuvenate it" ... have led to the various doctrines asserting the mind's impotence and the force of the irrational, in brief to Hume's famous dictum that "Reason is and ought only to be the slave of the passions," that is, to a rather simple-minded reversal of the Platonic notion of reason's uncontested rulership in the household of the soul. What is so remarkable in all these theories and doctrines is their implicit monism, the claim that behind the obvious multiplicity of the world's appearances and, even more pertinently to our context, behind the obvious plurality of man's faculties and abilities, there must exist a oneness - the old hen pan, "the all is one" - either a single source or a single ruler.

It is not Matter itself that is here meant, but the ultimate Cause of things incorporeal, which also existed before Matter. Moreover, it is asserted by Heraclitus: "Death unto souls is but a change to liquid." This Attis, therefore, the intelligible Power, the holder together of things material below the Moon, having intercourse with the pre-ordained Cause of Matter, holds intercourse therewith, not as a male with a female, but as though flowing into it, since he is the same with it.

A nation never falls but by suicide.

Perhaps, if prematurely we dismiss ourselves from this world, all may even have to be suffered through again - the premature birth may not contribute to the production of another being, which must be begun again from the beginning.

The percept takes priority of the concept.

If you see a man who is unterrified in the midst of dangers, untouched by desires, happy in adversity, peaceful amid the storm, who looks down upon men from a higher plane, and views the gods on a footing of equality, will not a feeling of reverence for him steal over you, will you not say: "This quality is too great and too lofty to be regarded as resembling this petty body in which it dwells? A divine power has descended upon that man."

From the point of view of semantics, errors must be accidents: if in the extension of "horse" there are no cows, then it cannot be required for the meaning of "horse" that cows be called horses. On the other hand, if "horse" did not mean that which it means, and if it were an error for horses, it would never be possible for a cow to be called "horse." Putting the two things together, it can be seen that the possibility of falsely saying "this is a horse" presupposes the existence of a semantic basis for saying it truly, but not vice versa. If we put this in terms of the crude causal theory, the fact that cows cause one to say "horse" depends on the fact that horses cause one to say "horse"; but the fact that horses cause one to say "horse" does not depend on the fact that cows cause one to say "horse"...

Point set topology is a disease from which the human race will soon recover.

Every relationship between two individuals or two groups will be characterized by the ratio of secrecy that is involved in it. Even when one of the parties does not notice the secret factor, yet the attitude of the concealer, and consequently the whole relationship, will be modified by it.

I am responsible for everything ... except for my very responsibility, for I am not the foundation of my being. Therefore everything takes place as if I were compelled to be responsible. I am abandoned in the world ... in the sense that I find myself suddenly alone and without help, engaged in a world for which I bear the whole responsibility without being able, whatever I do, to tear myself away from this responsibility for an instant.

A bad feeling is a commotion of the mind repugnant to reason, and against nature.

The subject must distinguish itself through opposition from the rational being, which it has assumed outside of itself. The subject has posited itself as one, which contains in itself the last ground of something that is in it, (for this is the condition of Egohood, or of Rationality generally;) but it has also posited a being outside of itself, as the last ground of this something in it. It is to have the power of distinguishing itself from this other being; and this is, under our presupposition, possible only, if the subject can distinguish in that given something how far the ground of this something lies in itself and how far it lies outside of itself.

Respect the faculty that forms thy judgments.

So live, my boys, as brave men; and if fortune is adverse, front its blows with brave hearts.

I am happy because I want nothing from anyone. I do not care about money. Decorations, titles or distinctions mean nothing to me. I do not crave praise. The only thing that gives me pleasure, apart from my work, my violin, and my sailboat, is the appreciation of my fellow workers.

No nobler feeling than this of admiration for one higher than himself dwells in the breast of man. It is to this hour, and at all hours, the vivifying influence in man's life.

There is in the true man of science a desire stronger than the wish to have his beliefs upheld; namely, the desire to have them true.