This is the love of God which was supremely displayed in the cross (5:8; 8:32, 37), which has been poured into our hearts by the Holy Spirit (5:5), which has drawn out from us our responsive love (8:28), and which in its essential steadfastness will never let us go, since it is committed to bringing us safe home to glory in the end (8:35, 39). Our confidence is not in our love for him, which is frail, fickle and faltering, but in his love for us, which is steadfast, faithful and persevering. The doctrine of ‘the perseverance of the saints’ needs to be re-named. It is the doctrine of the perseverance of God with the saints.
Let me no more my comfort draw
From my frail hold of thee;
In this alone rejoice with awe—
Thy mighty grasp of me.
John R. W. Stott, The Message of Romans: God’s Good News for the World (pgs. 259–260).