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

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

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

All men's miseries derive from not being able to sit in a quiet room alone.

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.

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.

Absolutely lonely people have few personal interactions of any kind.

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