Sometimes our choice is made along a crystal clear line between right and wrong. There are things that we simply must be rid of. They cannot exist in our lives for they tear us away from loving God. Some of these things are spelled out in Scripture. Adultery is always wrong.
Murder is always wrong.
No exceptions an be made because these actions have been expressly judged by God in His word. Other times the choice is not so easily made. In those times, we need a heart and mind that seeks out the Lord prayerfully and honestly. In a loving, worshipful relationship He will make plain to us the choices we need to make to enjoy the closeness of His Presence. We also need the counsel of wise, mature Believers who've walked the road before us.