The Hope of Glorious Inheritance - Romans 8:16-25
Intro
The Spirit’s Testimony
In verse 15 reference is made to the filial response registered in the heart of the believer himself—“We cry, Abba, Father”. To use the language of verse 16, it is the witness borne by the believer’s own consciousness in virtue of the Holy Spirit’s indwelling as the Spirit of adoption. Now in verse 16 it is the witness borne by the Holy Spirit himself. And this latter witness is conceived of as working conjointly with the witness borne by the believer’s own consciousness. The Spirit’s witness must, therefore, be distinguished from the witness of our filial consciousness. It is a witness given to us as distinct from the witness given by us. The witness thus given is to the effect that “we are children of God”.
Yes, doubts intrude. Feelings fade and vacillate. We wonder, philosophically, how words can establish a relationship with the eternal God. Or we question our sincerity: “Am I different from anyone else? Am I stronger than I was two years ago?” We are impatient gardeners, waiting for seeds to sprout, and then tugging on those sprouts and judging them feeble. But if we wait, assurance comes as “the Spirit himself bears witness with our spirit.” As Sinclair Ferguson remarks in Children of the Living God, we can make two mistakes here: to expect a mystical, transporting experience and to expect nothing. Assurance can be dramatic or calm, but either way, it is a “joint witness” of God’s Spirit and ours.
Finally, the testimony of the Holy Spirit clinches the matter. He is a seal (2 Cor. 1:20–21; Eph. 1:13–14), denoting ownership. He is the guarantee of our future inheritance, an earnest or deposit securing the full payment at a later date. Here lies the difference with Rome. Rome allows assurance based on good works, but this amounts to no more than a conjectural probability. The Reformers stressed the infallibility of assurance, since the testimony of the Spirit is infallible. This is no mystical experience unchecked by any objective criterion. His testimony is based on the promise of salvation revealed in his Word. It is rooted in Scripture, the ministry of the Word, and the sacraments.
Those who have filial feelings towards God, who love him, and believe that he loves them, and to whom the Spirit witnesses that they are the children of God, cannot doubt that they are indeed his children.