In "God's Word for Today" William Snider writes:

The Apostle Paul correctly told the Corinthians that we have the treasure of salvation in “earthen vessels” (2 Cor. 4:7). The provisions of the atonement do not address the impairments to our humanity. Paul called them “infirmities.” Sometimes these defects may have spiritual consequences for us and others. Often the devil will capitalize on these to shake our confidence in the work of God in us. It is impor-tant that we recognize and not dismiss these. Yet we must not despair because of them. God is aware of these flaws. He has made provision for our ongoing maturity. Think about this promise and His provision as you contemplate imperfect self. They do not affect His love for you.

Source: Studies in Romans: Adult Teacher's Insights, page 46.