It’s not the Genetic Fallacy if it’s relevant: The wildly popular, new-fangled notion of “self-esteem” was created by a professedly atheistic psychologist, Nathaniel Branden (co-creator of Randian “Objectivism”). Self-confidence is beautiful. Self Esteem is just another term for human deification.
We have explained the basic idea several times here in the past. Man qua man is of no value. All we have is bare potential – potential to serve our Maker.