Absolutely lonely people have few personal interactions of any kind.

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

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

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

Even in the presence of others he was completely alone.

I never said, 'I want to be alone.' I only said, 'I want to be left alone.' There is all the difference.

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

As I get older I'm more and more comfortable being alone.

I restore myself when I'm alone.

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