2 Corinthians 4:13-16 ESV
Since we have the same spirit of faith according to what has been written, “I believed, and so I spoke,” we also believe, and so we also speak, knowing that he who raised the Lord Jesus will raise us also with Jesus and bring us with you into his presence. For it is all for your sake, so that as grace extends to more and more people it may increase thanksgiving, to the glory of God.
So we do not lose heart. Though our outer self is wasting away, our inner self is being renewed day by day.
ESV: English Standard Version 2016