He will have compassion upon us; he will subdue our iniquities. And Thou wilt cast all their sins into the depths of the sea.@Micah 7:19
Isaac Watts (1674–1748)

Isaac Watts, Hymns and Spiritual Songs 1707–09, Book II, number 85. Sufficiency of pardon.

Aberdeen, possibly by Andrew Tait, in James Chalmers’ untitled collection, 1749; melody from Rudiments of Music, by Robert Bremner, 1756 (🔊 pdf nwc).

Why does your face, ye humble souls,
Those mournful colors wear!
What doubts are these that waste your faith,
And nourish your despair?

What though your numerous sins exceed
The stars that fill the skies,
And aiming at th’eternal throne,
Like pointed mountains rise:

What though your mighty guilt beyond
The wide creation swell,
And has its cursed foundations laid
Low as the deeps of hell:

See here an endless ocean flows
Of never-failing grace;
Behold a dying Savior’s veins
The sacred flood increase.

It rises high, and drowns the hills,
Has neither shore nor bound:
Now, if we search to find our sins,
Our sins can ne’er be found.

Awake, our hearts, adore the grace
That buries all our faults;
And pardoning blood, that swells above
Our follies and our thoughts.