Analysis of What Shall I Render

For mercies, countless as the sands,
Which daily I receive
From Jesus, my Redeemer's hands,
My soul what canst thou give?

Alas! from such a heart as mine,
What can I bring him forth?
My best is stained and dyed with sin,
My all is nothing worth.

Yet this acknowledgment I'll make
For all he has bestowed;
Salvation's sacred cup I'll take
And call upon my God.

The best returns for one like me,
So wretched and so poor;
Is from his gifts to draw a plea,
And ask him still for more.

I cannot serve him as I ought,
No works have I to boast;
Yet would I glory in the thought
That I shall owe him most.