The question whether truth is necessary, must not merely be affirmed beforehand, but must be affirmed to such an extent that the principle, belief, or conviction finds expression, that there is nothing more necessary than truth, and in comparison with it everything else has only a secondary value.

How much truth does a spirit endure, how much truth does it dare? That became for me the real measure of value.

A man should look for what is, and not for what he thinks should be.

The love of truth has its reward in heaven and even on earth.

It is not when truth is dirty, but when it is shallow, that the lover of knowledge is reluctant to step into its waters.

All credibility, all good conscience, all evidence of truth come only from the senses.