Feeling Alone Guides The Mind.

Put Off Your Imagination, As You Put Off Your Overcoat, When You Enter The Laboratory. Put It On Again, As You Put On Your Overcoat, When You Leave.

Man Can Learn Nothing Unless He Proceeds From The Known To The Unknown.

The Investigator Should Have A Robust Faith - And Yet Not Believe.

Il Ne Fallait Jamais Faire Des Expériences Pour Confirmer Ses Idées, Mais Simplement Pour Les Contrôler. We Must Never Make Experiments To Confirm Our Ideas, But Simply To Control Them.

Well-observed Facts, Though Brought To Light By Passing Theories, Will Never Die; They Are The Material On Which Alone The House Of Science Will At Last Be Built.