Posterity will one day laugh at the foolishness of modern materialistic philosophers.

Luck favors the mind that is prepared.

The greatest derangement of the mind is to believe in something because one wishes it to be so.

Every chemical substance, whether natural or artificial, falls into one of two major categories, according to the spatial characteristic of its form. The distinction is between those substances that have a plane of symmetry and those that do not. The former belong to the mineral, the latter to the living world.

Intuition is given only to him who has undergone long preparation to receive it.

Without theory, practice is but routine born of habit. Theory alone can bring forth and develop the spirit of inventions.

It is not the germs we need worry about. It is our inner terrain.