None are so old as those who have outlived enthusiasm.

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

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.

A man is rich in proportion to the number of things he can afford to let alone.

The man who goes alone can start today but he who travels with another must wait till that other is ready.