The Symposium (Banquet of the Ten Virgins): The Whole Number of Spiritual Sheep; Man a Second Choir, After the Angels, to the Praise of God; The Parable of the Lost Sheep Explained

Now, since He truly was and is, being in the beginning with God, and being God, He is the chief Commander and Shepherd of the heavenly ones, whom all reasonable creatures obey and attend, who tends in order and numbers the multitudes of the blessed angels. For this is the equal and perfect number of immortal creatures, divided according to their races and tribes, man also being here taken into the flock. For he also was created without corruption, that he might honour the king and maker of all things, responding to the shouts of the melodious angels which came from heaven. But when it came to pass that, by transgressing the commandment (of God), he suffered a terrible and destructive fall, being thus reduced to a state of death, for this reason the Lord says that He came from heaven into (a human) life, leaving the ranks and the armies of angels. For the mountains are to be explained by the heavens, and the ninety and nine sheep by the principalities and powers which the Captain and Shepherd left when He went down to seek the lost one. For it remained that man should be included in this catalogue and number, the Lord lifting him up and wrapping him round, that he might not again, as I said, be overflowed and swallowed up by the waves of deceit. For with this purpose the Word assumed the nature of man, that, having overcome the serpent, He might by Himself destroy the condemnation which had come into being along with man’s ruin. For it was fitting that the Evil One should be overcome by no other, but by him whom he had deceived, and whom he was boasting that he held in subjection, because no otherwise was it possible that sin and condemnation should be destroyed, unless that same man on whose account it had been said, “Dust thou art, and unto dust thou shalt return,” should be created anew, and undo the sentence which for his sake had gone forth on all, that “as in Adam” at first “all die, even so” again “in Christ,” who assumed the nature and position of Adam, should “all be made alive.”