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

I don't want to be alone, I want to be left alone.

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

Associate with men of good quality if you esteem your own reputation for it is better to be alone than in bad company.

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

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.

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

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.

Even in the presence of others he was completely alone.

Absolutely lonely people have few personal interactions of any kind.