The egotist is next-door to a fanatic.

Constantly occupied with self, he has no thought to spare for others.

He refers to himself in all things, thinks of himself, and studies himself, until his own little self becomes his own little god.
Worst of all are the grumblers and growlers at fortune--who find that "whatever is is wrong," and will do nothing to set matters right--who declare all to be barren "from Dan even to Beersheba." These grumblers are invariably found the least efficient helpers in the school of life.
As the worst workmen are usually the readiest to "strike," so the least industrious members of society are the readiest to complain.

The worst wheel of all is the one that creaks.
There is such a thing as the cherishing of discontent until the feeling becomes morbid.

The jaundiced see everything about them yellow.