You cannot be lonely if you like the person you're alone with.

A man content to go to heaven alone will never go to heaven.

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

Every man is born as many men and dies as a single one.

It is strange to be known so universally and yet to be so lonely.

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

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

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

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

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.