Some people hate people who are overconfident, only because their overconfidence reminds them of their underconfidence.
A relationship is likely to last way longer, if each partner convinces or has convinced themselves that they do not deserve their partner, even if that is not true.
Bigheadedness is usually a symptom of small-mindedness.
Although Jesus Christ was Himself the Creative Deity, by whom all things were made, as man He humbled Himself--set aside His divine prerogatives and walked this earth as man -- a perfect demonstration of what God intended man to be--the whole personality yielded to and occupied by God for Himself.