Jesus describes becoming a Christian as a new birth. (see John 3:3-5). Picture yourself as an apple tree, but you would really like to bear peaches. You can be pruned, or someone can attach peaches with wire to your branches. But apples will keep coming. If you want peaches, you have to dig up the apple tree and plant a peach tree.Jesus said, "Verily, verily, I say unto thee, Except a man be born again, he cannot see the kingdom of God." (John 3:3). And Paul pointed out that once we experience that new birth, everything becomes new! "Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new." (2 Corinthians 5:17)
New roots are needed for new fruit. All we do is modify the same tree when we make resolutions and commitments to pray more, go to church more consistently, or resolve to stop bad behavior. The root needs to be pulled up. A new tree is needed.
Have you been born again... made new in Christ? Or are you trying to turn your apples into peaches on your own?