John Newton (1725-1807) known for the great hymn “Amazing Grace” expressed understanding of Law and Gospel in another hymn he wrote…
“Safely Through Another Week” – Verse 5…
May Thy Gospel’s joyful sound
Conquer sinners, comfort saints;
Make the fruits of grace abound,
Bring relief for all complaints.
Thus may all our Sabbaths prove
Till we join the Church above.