A couple of pithy quotes:

We often act as though comfort and luxury were the chief requirements of life, when what we really need to make us happy is something to be enthusiastic about.

Wonder if the writer of that statement considered serial killers.

Self-centered people are the ones who spend so much time talking about themselves that we never get a chance to talk about ourselves.

If according to the first writer the key to happiness is something to be enthusiastic about, why not choose self? The self-centered have found something to be enthusiastic about, therefore are happy, and won't shut up about it.

The quotes come from some tracts about management and leadership. I bought them at a garage sale. They were published in the mid-1980's. The tracts do not contain anything particularly profound. The content is broken up so that a concept can be conveyed during an average bowel movement.