"Duty is heavier than a mountain, death lighter than a feather."

"Once you've accumulated sufficient knowledge to get by, you're too old to remember it."

"I like the night. Without the dark, we'd never see the stars."

"Idleness is an inlet to disorder, and makes way for licentiousness. People who have nothing to do are quickly tired of their own company."

"You are what you file."

"There's a bit of magic in everything, and some loss to even things out."

"Jealousy is the tribute mediocrity pays to genius."

"The most successful businessman is the man who holds onto the old just as long as it is good, and grabs the new just as soon as it is better."

"Statistically the probability of any one of us being here is so small that you would think the mere possibility of existence would keep us all in a contented dazzlement of surprise."

"Among the individuals, as well as among nations, respecting the other people's rights leads to peace. (Entre los individuos, como entre las naciones, el respeto al derecho ajeno es la Paz.)"

"Not everybody has to sing the melody."

"If you can't describe what you are doing as a process, you don't know what you're doing."