Self-righteousness

Jared Wilson: "How do we become holy without becoming 'holier than thou'?"

.... By actually becoming actually holy.

Holiness and holier-than-thou-ness aren’t parallel phenomena. They run on different tracks. If someone is growing in arrogance, pride, and self-righteousness, by definition they are not growing in holiness.

The problem arises in equating holiness with religious behavior. Holy people do obey God, of course. But the character of holiness, in which the Spirit does his progressive sanctifying work in our hearts (and therefore in our thoughts, speech, and actions), produces qualities of humility, gentleness, kindness, and self-control. Any arrogant fool can abstain from certain sins.... [more]

Holy vs. Holier Than Thou – Gospel Driven Church