No one is altogether to be blamed for the defects of his nature; but he is blameworthy if he takes no pains to correct them.
The most considerable difference I can see between men and animals is not in reason, but in the extent of the power of using it.
That man, I think, has had a liberal education who has been so trained in youth that his body is the ready servant of his will.
Freedom and order are not incompatible; truth is strength; free discussion is the very life of truth.
Eager and intense desire is the mainspring of all effective effort.
Patience and tenacity of purpose are worth more than twice their weight of cleverness.
The great tragedy of Science—the slaying of a beautiful hypothesis by an ugly fact.
The saying that a little knowledge is a dangerous thing is, to my mind, a very dangerous adage.
It is not what we believe, but why we believe it; moral responsibility begins there.
Logical consequences are the scarecrows of fools and the beacons of wise men.