Always give a word or sign of salute when meeting or passing a friend, or even a stranger, if in a lonely place.

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

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

I paint self-portraits because I am so often alone, because I am the person I know best.

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

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

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.

When so many are lonely as seem to be lonely, it would be inexcusably selfish to be lonely alone.

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.