For in this hope we were saved; but hope that is seen is no hope at all. Who hopes for what he can already see?
24. For by hope, etc. Paul strengthens his exhortation by another argument; for our salvation cannot be separated from some kind of death, and this he proves by the nature of hope. Since hope extends to things not yet obtained, and represents to our minds the form of things hidden and far remote, whatever is either openly seen or really possessed, is not an object of hope.
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 we are saved by hope,.... We who have received the firstfruits, who were in a lost perishing condition, and by nature no better than others, than the Gentiles, are saved by sin and wrath to come by Christ, with a spiritual and everlasting salvation.