Friedrich Schiller

Disappointments are to the soul what a thunderstorm is to the air.

Dare to err and to dream. Deep meaning often lies in childish plays.

Who dares nothing, need hope for nothing.

Justice consists in doing no injury to men; decency in giving them no offense.

It is characteristic of science that the full explanations are often seized in their essence by the percipient scientist long in advance of any possible proof.

I am convinced that the majority of people would be generous from selfish motives, if they had the opportunity.