As I get older I'm more and more comfortable being alone.

I never said, 'I want to be alone.' I only said, 'I want to be left alone.' There is all the difference.

The capacity for not feeling lonely can carry a very real price, that of feeling nothing at all.

Only the lonely know the way I feel tonight.

Look at the sky. We are not alone. The whole universe is friendly to us and conspires only to give the best to those who dream and work.

All of our unhappiness comes from our inability to be alone.

If it's true that our species is alone in the universe, then I'd have to say the universe aimed rather low and settled for very little.

Every man must do two things alone he must do his own believing and his own dying.

All men's miseries derive from not being able to sit in a quiet room alone.