I was thinking about this a bunch, and came to a somewhat startling revelation as I expanded on the feminism trusims.

Self-esteem is the concept that, instead of valuing yourself as God does (priceless/precious), you must define and put a price on how much on how valued you are by worldly measures–money, attention, possessions, career, other people, etc.

This basically shows you in a sentence why self-esteem is very bad that anyone would understand, Christian or non-Christian.