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.

If you suppress laboratories, physical science will be stricken with barrenness and death.

Live in the serene peace of laboratories and libraries

In matters of observation chance favors only the prepared mind. (not literal translation) - Dan's les champs de observation le hasard ne favorise que les esprits prepares.

It would seem to me that I was committing a theft if I were to let one day go by without doing some work.

When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.

Chance favours the trained mind.