The following is a link to Dr. Lee Warren's 25 minute podcast episode entitled, "Brain Ruts Come From Mental Habits" (Part 2). In this video he gives an encouraging description of how God designed our minds to change and grow through repetition and focus. 

Dr. Warren is an award-winning author and practicing neurosurgeon who researches and teaches about the connections between faith, the Bible, and neuroscience. 

While he says at the beginning of this video that it's important to watch Part 1 to fully understand the material, we did not include that episode because everything is explained so well in Part 2. 

https://www.youtube.com/watch?v=ays3jHSTkQc