I take it that the good of mankind means the attainment, by every man, of
all happiness which he can enjoy without diminishing the happiness of his fellow men.
I took thought, and invented what I conceived to be the appropriate title of 'agnostic'.
If a little knowledge is dangerous, where is the man who has so much as to be out of danger?
In science, as in art, and, as I believe, in every other sphere of human activity, there may be wisdom in a multitude of counsellors, but it is only in one or two of them.
In scientific work, those who refuse to go beyond fact rarely get as far as fact.
Irrationally held truths may be more harmful than reasoned errors.
It is because the body is a machine that education is possible. Education is the formation of habits, a superinducing of an artificial organization upon the natural organization of the body.
It is not to be forgotten that what we call rational grounds for our beliefs are often extremely irrational attempts to justify our instincts.
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.