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

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.

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

Even in the presence of others he was completely alone.

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

Living alone makes it harder to find someone to blame.

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.

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.