For the creation was subjected to futility, not by its own will, but because of the One who subjected it, in hope
20. For to vanity has the creation, etc. He shows the object of expectation from what is of an opposite character; for as creatures, being now subject to corruption, cannot be restored until the sons of God shall be wholly restore; hence they, longing for their renewal, look forward to the manifestation of the celestial kingdom.
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
For the creature was made subject to vanity,.... This designs the vanity and emptiness of the minds of the Gentiles, who were without God and Christ, and the Holy Spirit, without the law and Gospel, and grace of God; also the vain conceits they had of themselves, of their wisdom, knowledge, learning, and eloquence; likewise their vain philosophy, particularly their gross idolatry, their polytheism, or...