There was one of his ...

There was one of his lonelinesses coming, one of those times when he walked the streets or sat, aimless and depressed, biting a pencil at his desk. It was a self-absorption with no comfort, a demand for expression with no outlet, a sense of time rushing by, ceaselessly and wastefully - assuaged only by that conviction that there was nothing to waste, because all efforts and attainments were equally valueless.
There was one of his lonelinesses coming, one of those times when he walked the streets or sat, aimless and depressed, biting a pencil at his desk. It was a self-absorption with no comfort, a demand for expression with no outlet, a sense of time rushing by, ceaselessly and wastefully - assuaged only by that conviction that there was nothing to waste, because all efforts and attainments were equally valueless.

Quotes from the same author

When a man is tired of life on his 21st birthday it indicates that he is rather tired of something in himself.
Thirty--the promise of a decade of loneliness, a thinning list of single men to know, a thinning brief-case of enthusiasm, thinning hair.
mother says that two souls are sometimes created together and--and in love before they're born.
Never confuse activity with action.
I think they're very attractive,' Abe agreed. 'I just don't think they're attractive, that's all.