 You cannot have the mind of Christ without getting a biblical inventory of doctrine in your soul. And you're not going to get a biblical inventory of the Word of God in your soul if you don't grow and do what the Bible says, study to show yourself approved unto God, a workman that needeth not to be ashamed, rightly dividing the Word of truth. Sixth, spiritual exercise is simply you having the self-discipline to stay filled with the Holy Spirit.