To Have the Spirit Is to Believe the Gospel

"The Holy Spirit is called the Spirit of truth, as also the Spirit of grace. He speaks and breathes only the grace and truth that came by Jesus Christ. When a man, then, comes to know the gospel, or to receive this Spirit, he thinks of no other grace but what appeared in Christ's tasting death for men; no other truth, but what was manifest in Christ, the end of the law for righteousness. This differs not a little from what the popular doctrine leads us to think of; namely, the truth of grace in the heart. When our systems describe faith to us, as a saving grace bestowed on us, by which we make use of Christ for salvation, are we not led to think of some grace necessary to our salvation, beside what appeared when Christ, by the grace of God, tasted death for the sins of men?" - Robert Sandeman, Letters on Theron and Aspasio, pg. 308-309