Theories Pass. The Frog Remains.

It Takes A Very Deep-rooted Opinion To Survive Unexpressed.

Nothing Leads The Scientist So Astray As A Premature Truth.

In Art As In Life The Valid Sacrifices Are Those That Bring No Income.

A Man Is Not Old As Long As He Is Seeking Something.

Le Biologiste Passe, La Grenouille Reste. The Biologist Passes, The Frog Remains.