We do not have to visit a madhouse to find disordered minds; our planet is the mental institution of the universe.

A school of art or of anything else is to be looked on as a single individual, who keeps talking to himself for a hundred years, and feels an extreme satisfaction with his own circle of favorite ideas, be they ever so silly.

I am fully convinced that the soul is indestructible, and its activity will continue through eternity.

Yes, I have finally arrived to this Capital of the World! I now see all the dreams of my youth coming to life... Only in Rome is it possible to understand Rome.

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

We must be young to do great things.

Hypotheses are the scaffolds which are erected in front of a building and removedd when the building is completed. They are indispensable to the worker; but the worker must not mistake the scaffolding for the building.