Even in the presence of others he was completely 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.

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.

In Genesis, it says that it is not good for a man to be alone but sometimes it is a great relief.

I love to be alone. I never found the companion that was so companionable as solitude.

Every man must do two things alone he must do his own believing and his own dying.

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

What a lovely surprise to finally discover how unlonely being alone can be.

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