CONCEIT

It is by definition 'an excessively favorable opinion of one's own ability and importance'. 

Paul's exhortation ...  For by the grace [of God] given to me I say to every one of you not to think more highly of himself [and of his importance and ability] than he ought to think; but to think so as to have sound judgment, as God has apportioned to each a degree of faith [and a purpose designed for service]. (Romans 12:3 Amp)

By nature, the 'conceited' will not come to the aid of a fallen brother in Christ ... 

Brothers, if anyone is caught in any sin, you who are spiritual [responsive to the guidance of the Spirit] are to restore such a person in a spirit of gentleness [not with a sense of superiority or self-righteousness], keeping a watchful eye on yourself, so that you are not tempted as well. Carry one another’s burdens and in this way, you will fulfill the requirements of the law of Christ [that is, the law of Christian love]. For if anyone thinks he is something [special] when [in fact] he is nothing, he deceives himself.       (Galatians 6:1-3 Amp)

A man who has a conceited opinion of his own personal walk of faith, thinking himself to be greatly enlightened and accomplished as a believer ... stumbles at the foot of the cross. Rather than showing compassion to the fallen, he glories over their failure. This 'religious' idealist refuses to come to a friend's side. He is instead judgmental, watching him bear the burden alone (and perhaps adding to it with expressions of shame).

Do nothing from selfishness or empty conceit [through factional motives, or strife], but with [an attitude of] humility [being neither arrogant nor self-righteous], regard others as more important than yourselves.  (Philippians 2:3 Amp)

Humility is evidence of genuine Christianity. Whenever a believer is considered 'good' in the eyes of those who witness his walk of faith, he humbly acknowledges Jesus Christ. Self-glorification is far from him, for he hasn't forgotten what he was before the Lord brought salvation to his sin-laden soul.