The tranquility of the soul is the greatest wealth.
The real reward in science is knowing that your work can save lives.
The best way to predict the future is to invent it.
The only limit to our realization of tomorrow is our doubts of today.
"We are all in the gutter, but some of us are looking at the stars."
The best leaders listen more than they speak—understanding comes before action.
The greatest tragedy is not death, but forgetting one's mother tongue.