The human brain is millions of times more powerful than the most powerful supercomputer that exists today and it is also vastly more efficient. Each thought we have can actually change the structure and function of our brains. When you create new memories you physically change your brain.
And wherever your brain goes, the rest of your life goes. If your mind is set on love, your body will follow suit. If your brain is filled with worry and fear and selfishness, you will live a fearful, worried, self-centered life. If your mind loses contact with God, your body follows.
And that is why when Jesus came He focused on changing the ideas and thoughts that fill people’s minds. The word “repent” is a word that literally means: Change the way you think. Jesus saw a world of people perishing because of the way they thought.