Every man is born as many men and dies as a single one.

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

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.

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

We are all sentenced to solitary confinement inside our own skins, for life.

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.

The only real progress lies in learning to be wrong all alone.

If you are lonely when you're alone, you are in bad company.