Chance favours the prepared mind.

“The role of the infinitely small in nature is infinitely great.”

“Dans les champs de l'observation le hasard ne favorise que les esprits prepares…”

“Messieurs, c'est les microbes qui auront le dernier mot." (Gentlemen, it is the…”

“When I approach a child he inspires in me two sentiments tenderness for what he…”