Imagine settling for a life you can have because you don't have the courage to go after the life you really want.

It's the only real advantage to getting older. You get to say what you mean and stop apologizing.

The scientist only imposes two things, namely truth and sincerity, imposes them upon himself and upon other scientists.

A pedestal is as much a prison as any small, confined space.

What Conscience dictates to be done, Or warns me not to do; This teach me more than Hell to shun, That more than Heav'n pursue.

Shall I pass by and leave you lying there because of the expedition you led against Greece, or shall I set you up again because of your magnanimity and your virtues in other respects?

As Lord Chesterfield said of the generals of his day, 'I only hope that when the enemy reads the list of their names, he trembles as I do.

The more you are focused on time-past and future-the more you miss the Now, the most precious thing there is.

Music is my passion. It's my priority. I love it.

Gods have great power, but only humans have creativity, the power to change history.

Twitter is like hugging. Just because it's hard to measure the return on investment doesn't mean there isn't value there.

An astronomer must be cosmopolitan, because ignorant statesmen cannot be expected to value their services