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.

Language... has created the word 'loneliness' to express the pain of being alone. And it has created the word 'solitude' to express the glory of being alone.

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

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.

Every man must do two things alone he must do his own believing and his own dying.

Loneliness is my least favorite thing about life. The thing that I'm most worried about is just being alone without anybody to care for or someone who will care for me.

I have never found a companion that was so companionable as solitude. We are for the most part more lonely when we go abroad among men than when we stay in our chambers. A man thinking or working is always alone, let him be where he will.

I finally faced the fact that it isn't a crime not having friends. Being alone means you have fewer problems.

Yes, I guess you could say I am a loner, but I feel more lonely in a crowed room with boring people than I feel on my own.

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