Arise, O LORD; save me, O my God: for you have smitten all my enemies upon the cheek bone; you have broken the teeth of the ungodly.
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Augustine of Hippo
6. "I will not fear the thousands of people that surround me" (ver. 6). It is written in the Gospels how great a multitude stood around Him as He was suffering, and on the cross. "Arise, O Lord, save me, O my God" (ver. 7). It is not said to God, "Arise," as if asleep or lying down, but it is usual in holy Scripture to attribute to God what He doeth in us; not indeed universally, but where it can be done suitably; as when He is said to speak, when by His gift Prophets speak, and Apostles, or whatsoever messengers of the truth. Hence that text, "Would you have proof of Christ, who speaketh in me?" For he doth not say, of Christ, by whose enlightening or order I speak; but he attributes at once the speaking itself to Him, by whose gift he spake.
7. "Since Thou hast smitten all who oppose me without a cause." It is not to be pointed as if it were one sentence, "Arise, O Lord, save me, O my God; since Thou hast smitten all who oppose me without a cause." For He did not therefore save Hi...
Without cause. Hebrew, "on the jaw. "(Haydock)
Without redress. (Calmet)
Septuagint seems to have read leinom, as "some Jews say that the ancient copies were different. "(Origen, A.D. 231.) (Kennicott)
Teeth. Strength and fury.