Be isolated, be ignored, be attacked, be in doubt, be frightened, but do not be silenced.

One of the main causes of trouble in the world is dogmatic and fanatical belief in some doctrine for which there is no adequate evidence

If I were a medical man, I should prescribe a holiday to any patient who considered his work important.

It is not my prayer and humility that you cause things to go as you wish, but by acquiring a knowledge of natural laws.

Boys and young men acquire readily the moral sentiments of their social milieu, whatever these sentiments may be.

Dr. Arnold . . . the admired reformer of public schools, came across some cranks who thought it a mistake to flog boys. Anyone reading his outburst of furious indignation against this opinion will be forced to the conclusion that he enjoyed inflicting floggings.

No one gossips about other people's secret virtues.