We are our own aptest deceiver.

I have possessed that heart, that noble soul, in whose presence I seemed to be more than I really was, because I was all that I could be.

Wer fremde Sprachen nicht kennt, weiss nichts von seiner eigenen.He who is ignorant of foreign languages, knows not his own.

All truly wise thoughts have been thought already thousands of times; but to make them truly ours, we must think them over again honestly, until they take root in our personal experience.

The errors of the observer come from the qualities of the human mind.

Our virtues and view spring from one root.

[W]hat counts is that one perceives excellence and dares to give it expression, which sounds little but is in fact a great deal.