Thomas Boston, Works, 2:393:
Let believers admire free grace, pardoning mercy, and atoning blood, Ps. 32:1, that secures them from bearing the desert of their sin. Let them live to the Lord by whom they live. Think not little of your sins, O believer, though there be now no condemnation for you, being in Christ Jesus, Rom. 8:1; for every one of your sins deserves, though they cannot bring on, God’s wrath and curse. Yet tremble at the thoughts of sin; for ye are like the three children in the fiery furnace, compassed with a fire of sin that would burn you up, but the effect of it is stopped by the mediation of Christ.
Let believers admire free grace, pardoning mercy, and atoning blood, Ps. 32:1, that secures them from bearing the desert of their sin. Let them live to the Lord by whom they live. Think not little of your sins, O believer, though there be now no condemnation for you, being in Christ Jesus, Rom. 8:1; for every one of your sins deserves, though they cannot bring on, God’s wrath and curse. Yet tremble at the thoughts of sin; for ye are like the three children in the fiery furnace, compassed with a fire of sin that would burn you up, but the effect of it is stopped by the mediation of Christ.