Glossa Ordinaria — as excerpted in the Catena Aurea on Luke 1:54-55

“(non occ.) After a general mention of the Divine mercy and holiness, the Virgin changes the subject to the strange and marvellous dispensation of the new incarnation, saying, He hath holpen his servant Israel, &c. as a physician relieves the sick, becoming visible among men, that He might make Israel (i. e. him who sees God) His servant.”