Our self-esteem is more inclined to resent criticism of our tastes than of our opinions.
~ Francois, duc de La Rochefoucauld

Oft times, nothing profits more than self-esteem, grounded on just and right.
~John Milton, in Paradise Lost

To be specific, the self-sins are these: self-righteousness, self-pity, self-confidence, self-sufficiency, self-admiration, self-love and a host of others like them. They dwell too deep within us and are too much a part of our natures to come to our attention till the light of God is focused upon them. The grosser manifestations of these sins, egotism, exhibitionism, self-promotion, are strangely tolerated in Christian leaders even in circles of impeccable orthodoxy. They are so much in evidence as actually, form any people, to become identified with the gospel. I trust it is not a cynical observation to say that they appear these days to be a requisite for popularity in some sections of the Church visible. Promoting self under the guise of promoting Christ is currently so common as to excite little notice.
~ A.W. Tozer, in The Pursuit of God, Chapter 3 – Removing the Veil