Absolutely lonely people have few personal interactions of any kind.

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

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

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

I restore myself when I'm alone.

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

All men's misfortunes spring from their hatred of being alone.

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

Only the lonely know the way I feel tonight.