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

Unless we love and are loved, each of us is alone, each of us is deeply lonely.

A man content to go to heaven alone will never go to heaven.

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

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.

It's often just enough to be with someone. I don't need to touch them. Not even talk. A feeling passes between you both. You're not alone.

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

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.

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

All men's misfortunes spring from their hatred of being alone.