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

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

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.

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

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.

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

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

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

Before the throne of the Almighty, man will be judged not by his acts but by his intentions. For God alone reads our hearts.

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