True scientific progress is achieved not by mere accumulation of facts, but by the continuous refinement of theories and models.

The future is not a gift. It is an achievement.

I'm not a role model. I'm a father, a husband, a son, a brother, a friend. I'm a human being. I make mistakes. I have flaws. I'm not perfect. But I try to be the best person I can be.

The great advantage of telling the truth is that you don't have to remember what you said.