Books are the money of Literature, but only the counters of Science.

All truth, in the long run, is only common sense clarified.

Patience and tenacity are worth more than twice their weight of cleverness.

Misery is a match that never goes out.

It is not who is right, but what is right, that is of importance.

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 the customary fate of new truths, to begin as heresies, and to end as superstitions.

Learn what is true in order to do what is right.

Logical consequences are the scarecrows of fools and the beacons of wise men.

Make up your mind to act decidedly and take the consequences. No good is ever done in this world by hesitation.

My business is to teach my aspirations to confirm themselves to fact, not to try and make facts harmonize with my aspirations.

My experience of the world is that things left to themselves don't get right.

No delusion is greater than the notion that method and industry can make up for lack of mother-wit, either in science or in practical life.

No slavery can be abolished without a double emancipation, and the master will benefit by freedom more than the freed-man.

It is not to be forgotten that what we call rational grounds for our beliefs are often extremely irrational attempts to justify our instincts.