“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.” – 2 Corinthians 4:15-16 (ESV)
It is true that the physical bodies are by nature in a steady decay. There is no miracle or magical method that will arrest what the Apostle Paul calls ‘wasting away.’ That fact does not stop our unending search for renewal; attempting to find ways to slow the physical decline and maintain the vitality of youth. Our verses come in this chapter just after Paul has detailed what he has experienced in his body on account of his effort to bring the gospel and teaching of Jesus Christ to them. All that has happened has been for the sake of those who were served in Paul’s ministry. In other words, when the gospel enters the hearts and lives of an ever-increasing number of people, God’s grace abounds. These are fellow believers who begin to lead unbelievers to Christ. And as a result, all believers now live to please God and express their thanks to him. The effect of physical decay on Paul is that he does not lose heart and we shouldn’t either. We are promised that the eternal part of us which is within our soul and spirit is renewed every day.