So then it is not of him that willeth, nor of him that runneth, but of God that sheweth mercy.
So then it is not of him that willeth (or hath the inward intention),
Nor of him that runneth (maketh the active exertion): see, for illustration of this phrase, 1 Corinthians 9:24; 1 Corinthians 9:26; Philippians 2:16; Philippians 3:14. Both the 'willing' and the 'running' are indispensable to salvation; yet salvation is owing to neither,
But (is purely) of God that showeth mercy. This is strikingly expressed in Philippians 2:12-13: "Work out your own salvation with fear and trembling: for it is God which, out of His own good pleasure, worketh in you both to will and to do."