“Cling” is defined: “hold on tightly to; adhere or stick firmly or closely to; be hard to part or remove from.” Paul says that we are to “cling to what is good” (Romans 12:9). How do we do that?
First, we must know what good is. It is said that Jesus “went about doing good” (Acts 10:38), so we can start by looking at His actions and imitating Him. We are also told that the will of God is “good and acceptable and perfect” (Romans 12:2), so we can study what He reveals to us (James 1:21-25).
Second, once we know what it is, we need to think about it and apply it. Paul writes that we should meditate on noble, just, pure, lovely, virtuous things (Philippians 4:8). What is the result of such meditation? Jesus tells us, “A good man out of the good treasure of his heart brings forth good things” (Matthew 12:35).
Are you clinging to what is good? Studying it and meditating on it? Are you bringing forth good things to encourage those around you?