14.For whosoever are led by the Spirit of God, etc. This is a confirmation of what has immediately preceded; for he teaches us, that those only are deemed the sons of God who are ruled by his Spirit; for by this mark God acknowledges them as his own people. Thus the empty boasting of hypocrites is taken away, who without any reason assume the title; and the faithful are thus encouraged with unhesitating confidence to expect salvation. The import of the whole is this — “all those are the sons of God who are led (252) by God’s Spirit; all the sons of God are heirs of eternal life: then all who are led by God’s Spirit ought to feel assured of eternal life. But the middle term or assumption is omitted, for it was indubitable.
But it is right to observe, that the working of the Spirit is various: for there is that which is universal, by which all creatures are sustained and preserved; there is that also which is peculiar to men, and varying in its character: but what he means here is sanctification, with which the Lord favors none but his own elect, and by which he separates them for sons to himself.