“It’s not a person’s moral perfection that qualifies him or her for church membership. It’s just the opposite. It’s his or her recognition of a lack of moral perfection coupled with a hunger for it. It’s not the people who never sin; it’s the people who fight against sin. A church’s judicial work is to affirm not the righteous but the unrighteous who thirst for righteousness – the righteousness only God in Christ can give.”
Church Membership, p. 88-89.