Such is the state of life, that none are happy but by the anticipation of change: the change itself is nothing; when we have made it, the next wish is to change again.

There ought to be something very special about the boundary conditions of the universe, and what can be more special than that there is no boundary?

The earth has its music for those who will listen.

Don't worry about your physical shortcomings. I am no Greek god.

As for me, all I know is that I know nothing.

Reason and free inquiry are the only effectual agents against error.

Before you save the world, make sure your own house is in order.