If you have an orange tree in your backyard eventually you will probably see oranges grow. You can choose to paint the oranges a different color and you can even tie different fruit onto the branches to make it look like other fruit grew there. None of that changes what that tree is-it is still an orange tree.
We fall victim to the same thing in the church. We focus so intently on changing the outward appearance of things that we have forgotten the most important detail of changing our root structure. It is easy to put on a shirt with your church name on it and walk the halls on Sunday declaring how awesome God is. It is simple to pray out loud for the right things in a group of Christians. It is not a difficult thing to sing loudly when the worship music starts up and even lift a hand or two when we get to the chorus of the song. Without a change of heart (our root structure) you are still what you were before you knew Christ. Your true fruit (not just what others see inside church walls) is who you are.
I am thankful for the power of the Holy Spirit to change my roots. My daily prayer is that I would not be the same man tomorrow that I am today.