Change only favours minds that are diligently looking and preparing for discovery.
Where observation is concerned, chance favors only the prepared mind.
Inspiration is the impact of a fact on a well-prepared mind
Life comes only from life.
If science has no country, the scientist should have one, and ascribe to it the influence which his works may have in this world.
When I approach a child, he inspires in me two sentiments; tenderness for what he is, and respect for what he may become.