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

There are places and moments in which one is so completely alone that one sees the world entire.

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.

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

Absolutely lonely people have few personal interactions of any kind.

All men's misfortunes spring from their hatred of being alone.

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

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

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.