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

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

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.

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

The best part about being alone is that you really don't have to answer to anybody. You do what you want.

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

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.