Try to learn something about everything and everything about something.
It is not who is right, but what is right, that is of importance.
Skepticism is the highest duty and blind faith the one unpardonable sin.
Perhaps the most valuable result of all education is the ability to make yourself do the thing you have to do, when it ought to be done, whether you like it or not. It is the first lesson that ought to be learned and however early a man's training begins, it is probably the last lesson that he learns thoroughly.
The secret of genius is to carry the spirit of childhood into maturity.
I'd rather have an ape for an ancestor than a bishop.
Of the few innocent pleasures left to men past middle life, the jamming of common sense down the throats of fools is perhaps the keenest.
Science commits suicide when it adopts a creed.
It is far better for a man to go wrong in freedom than to go right in chains.
We are prone to see what lies behind our eyes, rather than what apprears before them.
The chess-board is the world, the pieces are the phenomena of the universe, the rules of the game are what we call the laws of Nature. The player on the other side is hidden from us.
The great tragedy of science - the slaying of a beautiful hypothesis by an ugly fact.
We live in a world which is full of misery and ignorance, and the plain duty of each and all of us is to try to make the little corner he can influence somewhat less miserable and somewhat less ignorant than it was before he entered.
God give me strength to face a fact though it slay me.
Learn what is true in order to do what is right.
There is but one right, and the possibilities of wrong are infinite.
The foundation of all morality is to have done, once and for all, with lying; to give up pretending to believe that for which there is no evidence, and repeating unintelligible propositions about things beyond the possibilities of knowledge.
The rung of a ladder was never meant to rest upon.
Action is the catalyst that creates accomplishments. It is the path that takes us from uncrafted hopes to realized dreams.
Without seeing any reason to believe that women are, on the average, so strong physically, intellectually, or morally, as men, I cannot shut my eyes to the fact that many women are much better endowed in all these respects than many men, and I am at a loss to understand on what grounds of justice or public policy a career which is open to the weakest and most foolish of the male sex should be forcibly closed to women of vigor and capacity.
Not far from the invention of fire we must rank the invention of doubt.
The Bible account of the creation of Eve is a preposterous fable.
Economy does not lie in sparing money, but in spending it wisely.
The man of science has learned to believe in justification, not by faith, but by verification.
It is not what we believe, but why we believe it. Moral responsibility lies in diligently weighing the evidence. We must actively doubt; we have to scrutinize our views, not take them on trust. No virtue attached to blindly accepting orthodoxy, however 'venerable'.
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