Harry Ironside - Commentary on Romans 15:13

But his point here is that it is not contrary to the predictions of the prophets, but entirely consistent with what God had been pleased to make known beforehand. And so he brings this masterly unfolding of the gospel and its result to a close by saying, “Now the God of hope fill you with all joy and peace in believing, that ye may abound in hope, through the power of the Holy Spirit” (vs. Romans 15:13).

In believing what? Why, simply in believing the great truths set forth in the epistle-the tremendous verities of our most holy faith-setting before us man’s ruin by sin and his redemption through Christ Jesus. When we believe this we are filled with joy and peace as we look on in hope to the consummation of it all at our Lord’s return, meantime walking before God in the power of the indwelling Spirit who alone makes these precious things real to us.

HA Ironside