If we want to protect forests, we must first understand them.

The best prophet of the future is the past.

The function of entrepreneurs is to reform or revolutionize the pattern of production by exploiting an invention or, more generally, an untried technological possibility for producing a new commodity or producing an old one in a new way.

To understand is to invent.

Tolerance becomes a crime when applied to evil.

The advantage of poetry over life is that poetry, if it is sharp enough, may last.