"Sometimes, when I see my grand daughters make small discoveries of their own, I wish I were a child."

"You must learn some of my philosophy. Think only of the past as its remembrance gives you pleasure."

"Making your mark on the world is hard. If it were easy, everybody would do it."

"Persevere. Nothing worthwhile is easy."

"Cynicism is a sorry kind of wisdom."

"Understanding reality is the most important thing because reality doesn't care what you want to be true."