A great scholar is seldom a great philosopher.

One man's word is no man's word; we should quietly hear both sides.

In all times it is only individuals that have advanced science, not the age.

The day is of infinite length for him who knows how to appreciate and use it.

I have often reaped what others have sowed. My work is the work of a collective being that bears the name Goethe.

Doubt can only be removed by action.

Our mistakes and failures are always the first to strike us, and outweigh in our imagination what we have accomplished and attained.