I got a question in regards to assurance of salvation and Romans 8:16. I know the Church teaches that we may have a moral and reasonable certainty of salvation (otherwise who would partake of the Eucharist?) but that we can’t have an absolute assurance that we will necessarily receive the gift of perseverance. But I’m troubled about Romans 8:16 that says this, “For the Spirit himself giveth testimony to our spirit, that we are the sons of God.” Now I’m troubled because the testimony is from the Spirit and since the Spirit cannot lie its witness must, of necessity, be infallible. If the Spirit then bears witness we are the sons of God then doesn’t that mean we can have absolute assurance? “If we receive the testimony of men, the testimony of God is greater. For this is the testimony of God, which is greater, because he hath testified of his Son.” (1 St John 5:9). I tried looking at Aquinas’ commentary on Romans to see what he would say but he seems to accidentally skip it. Please help me understand this verse. Thank you all.
Btw, here is Aquinas’ commentary: “Then he manifests the same thing through the testimony of the Holy Spirit, to show that we are not deceived in our confession; hence he says: the reason I say that we cry, Abba, Father (v.15) in the Holy Spirit is that the Spirit himself gives testimony to our spirit that we are the sons of God. He bears this testimony not with external words that reach men’s ears, as the Father gave testimony to his own Son in Matthew (Matt 3:17), but through the effect of filial love he produces in us. Therefore, he says that he gives testimony not to our ears but to our spirit: and we are witnesses of these things: and the Holy Spirit (Acts 5:32).”