8 “For the Lord shall preserve you from all evil”. From offenses in the sun, from offenses in the moon, from all evil shall He preserve you, who is your defence upon the hand of your right hand, who will not sleep nor slumber. And for what reason? Because we are amid temptations: “The Lord shall preserve you from all evil. The Lord preserve your soul:” even your very soul. “The Lord preserve your going out and your coming in, from this time forth for evermore”. Not your body; for the Martyrs were consumed in the body: but “the Lord preserve your soul;” for the Martyrs yielded not up their souls.
The persecutors raged against Crispina, whose birthday we are today celebrating; they were raging against a rich and delicate woman: but she was strong, for the Lord was her defence upon the hand of her right hand. He was her Keeper. Is there any one in Africa, my brethren, who knows her not? For she was most illustrious, noble in birth, abounding in wealth: but all these things were in her left hand, beneath her head. An enemy advanced to strike her head, and the left hand was presented to him, which was under her head. Her head was above, the right hand embraced her from above....
Source: The Enarrations, or Expositions, on the Psalms (New Advent)