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

I restore myself when I'm alone.

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.

It is strange to be known so universally and yet to be so lonely.

I love to be alone. I never found the companion that was so companionable as solitude.

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

The time you feel lonely is the time you most need to be by yourself.

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

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.

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