It should be one of the tests,” the old woman said. “Humans are almost always lonely.

A person, individually, is always terribly lonely forever and ever.

A man is a lonely thing.

the human soul is a lonely thing

Philosophers call this state of isolation and disconnection “species loneliness” — a deep, unnamed sadness stemming from estrangement from the rest of Creation, from the loss of relationship. As our human dominance of the world has grown, we have become more isolated, more lonely when we can no longer call out to our neighbors. It’s no wonder that naming was the first job the Creator gave Nanabozho.

...very lonely and, often, very unhappy, with the poignant misery that comes to lonely people who long to be social and cannot, somehow, step naturally and unselfconsciously into some friendly group

People souls — perennial loners. They're loners like stray stars.

There are men and women so lonely they believe God, too, is lonely.

All the lonely people. Where do they all belong

I am lonely, lonely.
I was born to be lonely,
I am best so!

from “Danse Russe

If one's different, one's bound to be lonely.

An isolated human in a simple society is usually a dead human...

Solitude—the feeling and knowledge that one is alone, alienated from the world and oneself—is not an exclusively Mexican characteristic. All men, at some moment in their lives, feel themselves to be alone. And they are. To live is to be separated from what we were in order to approach what we are going to be in the mysterious future. Solitude is the profoundest fact of the human condition. Man is the only being who knows he is alone, and the only one who seeks out another. His nature—if that word can be used in reference to man, who has "invented" himself by saying "No" to nature—consists in his longing to realize himself in another. Man is nostalgia and a search for communion. Therefore, when he is aware of himself he is aware of his lack of another, that is, of his solitude.

How lonely we are in the world; how selfish and secret, everybody!