The sun must set to rise.

I don't believe in inspiration, I believe in work.

The true joy of research comes from pushing the boundaries of what we thought was possible.

The task of the leader is to get his people from where they are to where they have not been.

The chief beauty about time is that you cannot waste it in advance. The next year, the next day, the next hour are lying ready for you, as perfect, as unspoiled, as if you had never wasted or misapplied a single moment in all your life. You can turn over a new leaf every hour if you choose.