Paul hopes for better things of the Galatians than his solemn words might imply, for he still includes them with himself and speaks of their common future hope. The subject of the Spirit’s work in the believer’s heart introduced in chapter 3:2 is still in Paul’s mind and continues to form the background to all his thinking.
The believer longs for this personal righteousness because he was saved to this end: to be holy as the Lord is holy. The body of sin continues to cause every believer to suffer anguish, but the sign that he is a believer is that he never gives up the struggle in the hope that God will give him the complete victory. It is by faith that the Christian waits for this hope of righteousness because he sees too much sin in his heart and feels its power too intimately to regard the existence of sin within as of no consequence. The final victory will come not as a result of the completion of a process that consists only of his effort, but with the supernatural intervention of God who will transform him in a way that no Christian is capable of transforming himself. Faith sees the future work of God as real and therefore does not give up hope of holiness. And it is the Spirit of God that keeps alive this faith and hope in the heart. The feeble flame that God has lit in our hearts would be extinguished quickly if it were not for the renewing influence of the Spirit.