Dream no small dreams for they have no power to move the hearts of men.

There is nothing in the world more shameful than establishing one's self on lies and fables.

A useless life is an early death.

There is nothing outside of us that is not at the same time in us, and as the external world has its colors the eye, too, has colors.

One must be something to be able to do something.

Science arose from poetry... when times change the two can meet again on a higher level as friends.

A state of affairs which leads to daily vexation is not the right state.