Even in the presence of others he was completely alone.

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

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

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

I don't want to be alone, I want to be left alone.

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

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

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

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