John Calvin on Romans 8:14

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 Αγονται — are led or conducted: “A metaphor taken from the blind or those in darkness, who know not how to proceed without a conductor. So we have need to be led by the Spirit in the way of truth, for we are blind and see no light. Or it is a metaphor taken from infants, who can hardly walk without a guide; for the regenerated are like little children lately born. Thus we are reminded of our misery and weakness; and we ought not to ascribe to ourselves either knowledge or strength apart from the Spirit of God.” — Pareus 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.

Romans 8:15-18

15. For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, Father.

15. Et enim non accepistis spiritum servitutis iterum in terrorem: sed accepistis Spiritum adoptionis, per quem clamamus, Abba, Pater.

16. The Spirit itself beareth witness with our spirit, that we are the children of God:

16. Ipse enim Spiritus simul testificatur spiritui nostro quod sumus filii Dei:

17. And if children, then heirs; heirs of God, and joint-heirs with Christ; if so be that we suffer with him, that we may be also glorified together.

17. Si vero filii, etiam hæredes; hæredes quidem Dei, cohæredes autem Christi: siquidem compatimur, ut et una glorificemur.

18. For I reckon that the sufferings of this present time are not worthy to be compared with the glory which shall be revealed in us.

18. Existimo certe non esse pares afflictiones hujus temporis ad futuram gloriam quæ revelabitur erga nos.