Cowley's Poem; Christ's Passion

How shall I grasp this boundless thing?
What shall I play? what shall I sing?
I'll sing the mighty riddle of mysterious love,
Which neither wretched men below, nor blessed spirits above
With all their comments can explain;
How all the Whole World's Life to die did not disdain.

From "Christ's Passion" by Abraham Cowley (1618-1667)