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.

There are places and moments in which one is so completely alone that one sees the world entire.

I paint self-portraits because I am so often alone, because I am the person I know best.

You cannot be lonely if you like the person you're alone with.

Only the lonely know the way I feel tonight.

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

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.

The only real progress lies in learning to be wrong all alone.

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

Always give a word or sign of salute when meeting or passing a friend, or even a stranger, if in a lonely place.