Know this: there are sciences of matter and sciences of spirit.

There, where you see substances, I see forces that stretch one toward another with generating power.

To me, the character of bodies is the indication of their principles and the sign of their properties.
Those principles beget affinities which escape your knowledge, and which are linked to centres.

The different species among which life is distributed are unfailing streams which correspond unfailingly among themselves.

Each has his own vocation.