and if children, then heirs—heirs of God and fellow heirs with Christ, provided we suffer with him in order that we may also be glorified with him.
17. And if children, etc. By an argument, taken from what is annexed or what follows, he proves that our salvation consists in having God as our Father. It is for children that inheritance is appointed: since God then has adopted us as his children, he has at the same time ordained an inheritance for us.
In these words the apostle describes a fourth illustrious branch of the happiness of believers, namely, a title to the future glory. This is fitly annexed to our sonship; for as the adoption of sons entitles us to that glory, so the disposition of sons fits and prepares us for it. If children, then heirs, Rom 8:17.
Commenting on Romans 8:17-25
And if children, then heirs,.... Children, whether natural or adopted, are heirs to their parents, and according to the Roman laws, which some think the apostle here respects, whether male or female; but according to the Jewish laws (c), females did not inherit only in case of want of male issue; for though Job's daughters inherited with his sons, this was a peculiar case; and...