Proverbs 4:20-22

My son, pay attention to my words and be willing to learn; open your ears to my sayings. Do not let them escape from your sight; keep them in the center of your heart. For they are life to those who find them and healing and health to all their flesh. 

What we give our attention to will be the direction our mind and focus will go. God wants us to write His words on our hearts so we can live with sound minds, healed bodies, and prosperous souls. Our healing and prosperity depend on what we focus on and believe.