The only real progress lies in learning to be wrong all 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 have so many different personalities in me and I still feel lonely.

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

I never said, 'I want to be alone.' I only said, 'I want to be left alone.' There is all the difference.

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

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

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.

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