Try to learn something about everything and everything about something.
The known is finite, the unknown infinite; intellectually we stand on an islet in the midst of an illimitable ocean of inexplicability. Our business in every generation is to reclaim a little more land, to add something to the extent and the solidity of our possessions.
The great thing in the world is not so much to seek happiness as to earn peace and self-respect.
I am content with nothing, restless and ambitious... and I despise myself for the vanity, which formed half the stimulus to my exertions. Oh would that I were one of those plodding wise fools who having once set their hand to the plough go on nothing doubting.
Irrationally held truths may be more harmful than reasoned errors.
If a little knowledge is dangerous, where is the man who has so much as to be out of danger?
I protest that if some great Power would agree to make me always think what is true and do what is right, on condition of being turned into a sort of clock and would up every morning before I got out of bed, I should instantly close with the offer.
Learn what is true in order to do what is right.
Patience and tenacity are worth more than twice their weight of cleverness.
The great tragedy of science - the slaying of a beautiful hypothesis by an ugly fact.
Science is simply common sense at its best, that is, rigidly accurate in observation, and merciless to fallacy in logic.
Freedom and order are not incompatible... truth is strength... free discussion is the very life of truth.
The ultimate court of appeal is observation and experiment... not authority.
The improver of natural knowledge absolutely refuses to acknowledge authority, as such. For him, skepticism is the highest of duties; blind faith the one unpardonable sin.
It is one of the most saddening things in life that, try as we may, we can never be certain of making people happy, whereas we can almost always be certain of making them unhappy.
It is not who is right, but what is right, that is of importance.
Teach a child what is wise, that is morality. Teach him what is wise and beautiful, that is religion!
Nothing can be more incorrect than the assumption one sometimes meets with, that physics has one method, chemistry another, and biology a third.
History warns us that it is the customary fate of new truths to begin as heresies and to end as superstitions.
Science is organized common sense where many a beautiful theory was killed by an ugly fact.