Psalms 19:14
Let the words of my mouth and the meditation of my heart, be acceptable in Thy sight, O Lord, my strength and my redeemer.
We must understand that modern medicine can heal many of the afflictions of the body, and it also can even treat the tumors that attach themselves to the brain, but only God Himself can heal the mind. Do you know that many times your thoughts need to be healed? Your thoughts are often the product of damaged emotions, traumatic events, and vicious opinions forced upon you by the overbearing personalities of people who continually feel it necessary to express their opinions about you. One of the great challenges of our walk with God is to resist the temptation to allow what happened in the past to determine who we are today. We each must begin to understand and declare: "I am not what happened yesterday. I endured what happened. I survived what happened, but I am not what happened yesterday!"
Many people are plagued all their lives by memories of failed marriages, broken promises, and personal calamities. These negative impressions, armed with memories and flashback "movies," strengthen themselves by rehearsing past failures and wounds over and over again. It is somehow like bad television reruns, we don't even enjoy watching them, yet we find ourselves transfixed to the screen, growing more and more depressed and beaten down by these images of past failures and mistakes.
You must realize that you do not have to watch and rehearse these things, you do have the controls of your mind and you can control what you think. Just as you would do to a bad TV show, grab that remote and change the channel in your mind. The Bible teaches us that we are going to have to reprogram our minds to think on good things. Choose carefully what you think on, for ultimately you will become whatever it is that you meditate upon.