Iris and The law commands and makes us know

The law commands and makes us know
What duties to our God we owe;
But ‘tis the gospel must reveal
Where lies our strength to do His will.

The law discovers guilt and sin,
And shows how vile our hearts have been;
Only the gospel can express
Forgiving love and cleansing grace.

What curses does the law denounce
Against the man that fails but once!
But in the gospel Christ appears,
Pardoning the guilt of numerous years.

My soul, no more attempt to draw
Thy life and comfort from the law:
Fly to the hope the gospel gives:
The man that trust the promise lives.

Rev. Isaac Watts