Sin is the propensity for humans to live as if they are God. Sin is the decision to live life away from God rather than toward him. This decision can be subtle or blatant. It involves a contest of wills between humans and God. It is the oldest contest in the world, the pride of life, the saying yes to the temptation to live as if we humans are not accountable for our lives moment by moment to our Maker. Sin is the failure to surrender life, moment by moment, to the rule of God. We sin when we place ourselves in charge of our lives.

– Reggie McNeal
A Work of Heart – Understanding How God shapes Spiritual Leaders