Musar su Salmi 68:5

The general rule is that wherever you find true greatness you find humility. Our sages went so far as to say that "wherever you find the greatness of G–d described you will find His humility described at the same time" (Megillah 31a). Examples of this rule are written in the Torah, repeated in the Books of the Prophets and again repeated in the Hagiographa. We read in Deut. 10,17: "The Lord your G–d is the G–d of all gods, Master of all masters, the Great G–d, the Powerful One, the Awesome One, who does not show favoritism nor accept bribes." This is followed immediately by the statement "who upholds the cause of the orphan, the widow, who loves the proselyte (stranger) to provide him with bread and clothing." We read in Isaiah 57,15: "For thus says He who high aloft dwells forever, whose name is holy; I dwell on high, in holiness; yet with the contrite and the lowly in spirit- reviving the spirits of the lowly, reviving the hearts of the contrite." We read in Psalms 68,5: "Sing to G–d, chant hymns to His name; extol Him who rides the clouds; the Lord is His name. Exult in His Presence--the father of orphans, the champion of widows, G–d in His Holy Habitation. G–d restores the lonely to their homes, sets free the imprisoned safe and sound, etc."

"Thrice repeated in the hagiographa," refers to the subject of wisdom, i.e. חכמה, that the prophet says one should not boast of. A wise man should not use his standing in the community to demand extra consideration, preferential treatment, etc. We are to observe how G–d who is praised, sung to, exalted as the One who "rides in the heavens," and who would have every reason not to concern Himself with the lowly to delegate such activity to creatures of inferior rank, nevertheless undertakes personally to act as אבי יתומים, father of the orphans He even describes His function as such.