For Christians, the Bible talks about two kinds of sinful behavior: periodically falling into sin—a pitfall—and the practice of sin as a lifestyle. The Bible cautions us against stepping into the pitfall of sin, certainly, but more importantly it warns against choosing sin as a way of life.
Now we’d all be in big trouble if alienation from God resulted from occasionally falling into sin through the weakness of our flesh. Still, we must not discount sin of any kind as being insignificant in God’s eyes. The very nature of sin is that it has potential to spread, just like a cancer does in the body. All sin runs along a path that leads somewhere. The big question is this: when does sin as a pitfall develop into sin as practice? Where’s the line between sin that merely displeases God and sin that drives His Spirit from us?
From Free from the Power of Sin: the Keys to Growing in God in Spite of Yourself