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.

All of our unhappiness comes from our inability to be alone.

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

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

Alone we can do so little together we can do so much.

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

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

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

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

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