A prominent sin in the day we live in is sexual immorality, and this sin is also given fierce warnings in the Bible. We need to remember that warnings of sexual immorality aren't just for the pagan world; they're for many people who go to church and call themselves Christians.
One of the effects of believing that the creation account in the Bible took a long time is that it makes God look like a God who acts slowly. But every Christian knows that we don't need a God who acts slow; we need a mighty God who can act immediately on our behalf.
As Christians, we have the high calling of imitating God and loving others as Christ loved us. But we must never forget that our obedience must come from the reality that we're now God's beloved children.
Married men: don't pretend to have a glowing testimony in the church when you have wicked outbursts of anger against your wife. Don't try to hide it or justify it, but rather confess it and put it to death.