And he saw that there was no man, and wondered that there was no intercessor: therefore his arm brought salvation unto him; and his righteousness, it sustained him.
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George Leo Haydock
Himself, to arrest his arm, stretched out to chastise his son; or to second him. There is nothing in man to stop God's vengeance. He therefore pardons out of his own goodness, chap. lix. 2., and lxiii. 4. (Calmet)
He became man to redeem us, as no pure mortal could do it. (Worthington)