Living alone makes it harder to find someone to blame.

Even in the presence of others he was completely alone.

I don't want to be alone, I want to be left alone.

We are all sentenced to solitary confinement inside our own skins, for life.

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.

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.

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

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

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

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