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

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

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

The time you feel lonely is the time you most need to be by yourself.

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

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.

It's often just enough to be with someone. I don't need to touch them. Not even talk. A feeling passes between you both. You're not alone.

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