Steve,
You're right. We do not want to. But thanks be to God that He has given us His Spirit to wage war against sin. Will we still fall? Yes. But we know that Chriat was tempted in every way that we are. It is not an impossible battle. 

Sin is so desirable. God tells us, "don't do this." What is our natural reaction? To do it. It's like telling our kids, "Don't stay out too late. Don't go see that rated R movie." So what is their natural reaction? To go and do it. That is why we are to cultivate the fruit of the spirit. Easy? Nope. But is it what God wants for us to be for our best and His best? Yeah. Tough.