Do not lose heart. Even though our outward man is perishing, yet the inward man is being renewed day by day. (2 Corinthians 4:16 NKJV)

So we aren’t depressed. But even if our bodies are breaking down on the outside, the person that we are on the inside is being renewed every day. (2 Corinthians 4:16 CEB)

I will give them singleness of heart and put a new spirit within them. I will take away their stony, stubborn heart and give them a tender, responsive heart. (Ezekiel 11:19 NLT)