Luke 1:43: Whence is it that my Lord

Whence is it that my Lord
Himself should visit me.
Should stoop to such a wretch abhorr'd,
And claim my misery?
He leaves His throne above
For His own mercy sake,
He comes constrain'd by pitying love,
And doth my nature take.

The mystery of Thy grace
What angel can conceive?
Thou wouldst to all our ransom'd race
Faith and salvation give,
Thou dost the grace reveal,
Thou dost the faith impart,
And thus Thou com'st again to dwell
For ever in my heart.