The capacity for not feeling lonely can carry a very real price, that of feeling nothing at all.

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

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.

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

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

I restore myself when I'm 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.

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