1 Samuel 16:11

So he sent, and brought him, etc. The old man Simeon desired, as did the other saints of that time, for the Lord to come in the flesh, and He came. However, he was red from the blood of the Passion; because the good shepherd lays down his life for the sheep (John 10). He was also fairer in form than the sons of men; because He committed no sin, nor was deceit found in His mouth (Psalm 44; 1 Peter 2). This is similar to what the bride speaks in his praise: My beloved is white and ruddy (Song of Solomon 5); white in action, ruddy in blood. And what follows there, Chosen from thousands; this is what is signified here as David, rejected by his brothers, is anointed alone.

And Samuel said to Jesse: Send and bring him, etc. The prophets of that time said to the holy ones: Send the devoted intention of your mind, and with prayers frequently offered to God, obtain the advent of Christ, saying: Show us, O Lord, your mercy, and grant us your salvation (Psalm 34); and other such things. For indeed, we cannot recline with Abraham, Isaac, and Jacob in the kingdom of heaven, until the Son of God, humble and poor, comes and, having broken the snare of death, grandly opens for us the gates of life. For He himself in the Gospel testifies that we cannot recline, that is, rest in the kingdom, by our own means but by His grace: Amen, I say to you, that He will gird Himself, and make them recline, and will come and serve them (Luke 12).

And Samuel said to Jesse: Are all the children finished? etc. After the teachers of the law, the herald of prophecy, the sweetness of psalmody, and the long devotion of the people had been sent forth into the world, with the people instructed in divine services by the law of Moses, prophets, and psalmists, the incarnation of Christ was still to come in the fullness of time. Of which it is rightly understood what Jesse said: There is yet the least one, and he tends the sheep. For a child is born to us; a son is given to us (Isaiah IX). He who speaks in the Gospel: I am the good shepherd, and I know mine, and mine know me (John X). Nor without a certain reason of mystery is the same little one said to have tended the sheep before being anointed by the prophet; because that good Shepherd, who came that they might have life and have it more abundantly, tended ninety-nine sheep in heaven before he sought and found the hundredth on earth. He completed the number eight; for he gave us both the hope of our resurrection and his own example. Indeed, the day on which the Lord rose, from the day of his passion was the third, but from the day of the first creation, it is the eighth. Thus also after the six ages of this world, and the seventh, which is now being conducted in this life, the Sabbath of souls, as it were, the eighth age of our resurrection is hoped to come.