I suspect that the one reason why the Bible does not foster self-love and self-esteem in the fashion of several strands of popular psychology is because God, unlike popular psychologists, is infinitely aware of the danger of fueling idolatry. The first temptation was the temptation to de-god God and turn self into god. Appeals to self-love and self-esteem, even at their best and even when well-intentioned, can never be far from that danger. Far better to seek the powerful remedies of the gospel.