One of the most beautiful qualities of true friendship is to understand and to be understood.

It is true greatness to have in one the frailty of a man and the security of a god.

True happiness is... to enjoy the present, without anxious dependence upon the future.

The most beautiful thing we can experience is the mysterious. It is the source of all true art and science.

Most powerful is he who has himself in his own power.

Success consecrates the most offensive crimes.