R stands for renewal. Paul writes in Romans 12:2 (ESV), "Do not be conformed to this world, but be transformed by the renewal of your mind..." AA has coined the phrase "stinkin' thinkin'" to describe how even after an alcoholic stops drinking that his/her mind still has self-destructive thoughts. Likewise, even after someone receives the grace of God their thinking is still in need of overhaul. As a young Christian I was aghast at the thoughts that would pass through my mind (sometimes I still am) and would wonder if I were really a Christian. But renewing of the mind is a life-long process. When Paul says "be transformed" it is in the present tense which means it is a continual process. Martin Luther stated it this way in the first of his 95 theses, “When our Lord and Master, Jesus Christ, said ‘Repent’, He called for the entire life of believers to be one of repentance.” The renewal of the Holy Spirit happens as we spend time in God's Word. If we do not have a daily time in the Word we will see little progress in the renewal of our minds, because it is the Word of God that must replace our stinkin' thinkin' with God's thoughts.
O stands for obedience. Jesus said in John 14:15 (ESV), "If you love me, you will keep my commandments." The obedience that Jesus' desires is motivated by love. If a son only obeys his father out of fear neither of them will be satisfied with the relationship. We love Christ because He first loved us (1 John 4:19). When we love Him we will do what He asks, which is to love others with the same love that He loved us. That's what he meant by obedience. This is still a challenge because we must overcome our natural instinct of self-preservation and take on a life of sacrifice and service to others. As Christ laid down His life for us we are called to lay down our lives for our neighbors.
W stands for witness. Jesus said in Acts 1:8 (NLT), "But you will receive power when the Holy Spirit comes upon you. And you will be my witnesses, telling people about me everywhere..." Every Christian is called to bear a witness and confess Christ before others. Faith is never meant to keep to ourselves. The challenge of talking about witness is that it can easily become an "ought" instead of a privilege. When that happens the witness ceases to be authentic and it is no longer about the Good News for that other person but a obligation that we must keep in order to feel good about ourselves. Witnessing is no more than wanting others to know the Christ who loves them as much as He loves us. Paul puts it this way in 2 Corinthians 5:19 (NLT), "For God was in Christ, reconciling the world to himself, no longer counting people's sins against them. And he gave us this wonderful message of reconciliation." Because of the cross God no longer counts people's sins against them, therefore they can come home. Forgiveness is not the end but the means to the end. The end or goal is reconciliation with God, fellowship with Him, intimacy with Him. So GROW in the grace and knowledge of our Lord Jesus Christ.