One's self-esteem is very important. It is how one values himself. Not proud, not over humble.
Romans 12:3 For I say, through the grace given unto me, to every man that is among you, not to think of himself more highly than he ought to think; but to think soberly, according as God hath dealt to every man the measure of faith.
我凭著所赐我的恩对你们各人说：不要看自己过於所当看的，要照著神所分给各人信心的大小，看得合乎中道。
When we do not think at all, we're not humble, we're actually being rebellious against God. When one think of himself more highly...it is a sin too.
Hence, it has to be just right, according to the measure of our individual faith. Some are smarter than others, some are more capable of certain things, some are stronger, but I should value myself not according to others' selves, but my own, individual self.
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