I am reading the chapter on Philo in Andrew Louth’s The Origins of the Christian Mystical Tradition, so it warmed my heart during devotions with my wife last night to see the Middle Platonist, Alexandrian Jewish exegete in the Mosaic Holy Bible readings for Easter, Week 4 — with the BCP readings, 1 Pet. 2:19-26 and John 10:1-30, and, of course, Psalm 23. I hope you enjoy his words as much as I do. Philo says:
Indeed, so good a thing is shepherding that it is justly ascribed not to kings only and wise men and perfectly cleansed souls but also to God the All-Sovereign. The authority for this ascription is not any ordinary one but a prophet, whom we do well to trust. This is the way in which the Psalmist speaks: “The Lord shepherds me and nothing shall be lacking to me” (Ps. xxiii, 1). It well befits every lover of God to rehearse this Psalm. But for the Universe it is a still more fitting theme. For land and water and air and fire, and all plants and animals which are in these, whether mortal or divine, yea and the sky, and the circuits of sun and moon, and the revolutions and rhythmic movements of the other heavenly bodies, are like some flock under the hand of God its King and Shepherd. This hallowed flock He leads in accordance with right and law, setting over it His true Word and Firstborn Son Who shall take upon Him its government like some viceroy of a great king; for it is said in a certain place: “Behold I AM, I send My Angel before thy face to guard thee in the way” (Exod. xxiii. 20). Let therefore even the whole universe, that greatest and most perfect flock of the God who IS, say, “The Lord shepherds me, and nothing shall fail me.” Let each individual person too utter this same cry, not with the voice that glides forth over tongue and lips, not reaching beyond a short space of air, but with the voice of the understanding that has wide scope and lays hold on the ends of the universe. For it cannot be that there should be any lack of a fitting portion, when God rules, whose wont it is to bestow good in fullness and perfection on all that is.
XIII. Magnificent is the call to holiness sounded by the psalm just quoted; for the man is poor and incomplete in very deed, who, while seeming to have all things else, chafes at the sovereignty of One; whereas the soul that is shepherded of God, having the one and only thing on which all depend, is naturally exempt from want of other things, for it worships no blind wealth, but a wealth that sees and that with vision surpassingly keen.-De Agricultura or ‘On Husbandry’ 50-54, Loeb translation by F.H. Colson and G.H. Whitaker