If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.

A leader who does not take advice is not a leader.

Races are not won by the fastest athletes. Fights are not won by the strongest men. But the races are won and the fights are won by those who want to win most of all.

Do not feel certain of anything.

I owe my success to having listened respectfully to the very best advice, and then going away and doing the exact opposite.