1 Samuel 3:7

And therefore by no means let the ignorance or shallowness of one old man or of a few deter you and cut you off from that salutary path about which we have spoken and from the traditions of our forebears. The clever enemy misuses their gray hairs to deceive the young. But everything should be revealed to the elders without any obfuscating embarrassment, and from them one may confidently receive both healing for one's wounds and examples for one's way of life. Thanks to them we shall experience the same assistance and a like result if we strive to aim at nothing whatsoever by our own judgment and presumption.Finally, it is evident that this understanding is greatly pleasing to God, for not without reason do we find this same instruction even in holy Scripture. Thus, the Lord did not desire of himself to teach the boy Samuel through divine speech, once he had been chosen by his own decision, but he was obliged to return twice to the old man. He willed that one whom he was calling to an intimate relationship with himself should even be instructed by a person who had offended God, because he was an old man. And he desired that one whom he judged most worthy to be selected by himself should be reared by an old man so that the humility of him who was called to a divine ministry might be tested and so that the pattern of this subjection might be offered as an example to young men.

13. But because what follows is, "Moreover Samuel did not yet know the Lord," and above he is reported to have ministered to the Lord, what is said seems very contradictory, because he could not be ignorant of the one whom he was serving. For who serves one whom he does not know? But indeed through what is added, it becomes clear by what fitting reasoning that which sounds contradictory ought to be understood: "Nor had the word of the Lord been revealed to him." By which it is surely given to understand that the one whom he knew by love and ministry, he did not know by the revelation of His word. For he had not yet heard calling him the one whom he testified that he had known both by the devotion of ministry and by the power of love. But this is fittingly understood in the life of the faithful; for many advance well under another's guidance, who in the time of their newness perform services to almighty God, and yet do not attain by the purity of contemplation to the vision of His inner beauty. When by the merit of their submission they also receive the gift of divine contemplation, they understand by the experience of inner vision that they did not yet know the one whom they were serving. This Jacob well represents, setting out to receive a wife, who after the labor of his journey saw the Lord through the sleep of rest, but awakening from sleep said: "Truly the Lord is in this place, and I did not know it" (Gen. 28:16). For he who perceived that He exists everywhere could not have doubted that the Lord was there before he fell asleep; but because he then learned Him more perfectly, he declared that he had been ignorant of Him when he had not known Him more intimately. For the way by which one travels to a wife is the intention of devoted obedience, by which the fruitfulness of inner charity is desired to be attained. […]

9. For to call is to rouse through the force of a greater grace. For the Lord calls one who is sleeping, because He stirs up those who are resting from earthly pursuits to an increase of heavenly knowledge. For while we keep watch through concern for outward things, we do not perceive what is inward and spiritual. The setting aside of earthly care, therefore, is our preparation for receiving heavenly grace, because in the elect the outpouring of the divine gift becomes more abundant in proportion as the mind has been purer through the keeping of interior meditation. There follows: (Verses 4–9.) And the Lord called Samuel. Who answering, said: Here I am, and he ran to Eli and said: For you called me. Who said: I did not call you, my son; go back and sleep. And he went away and slept. And the Lord again called Samuel once more. And rising up, he went to Eli and said: Here I am, for you called me. Who answered: I did not call you, my son; go back and sleep. Now Samuel did not yet know the Lord, nor had the word of the Lord been revealed to him. And the Lord called Samuel again a third time. Who rising up, went to Eli and said: Here I am, for you called me. Eli therefore understood that the Lord was calling the boy, and he said to Samuel: Go and sleep, and if He calls you henceforth, you shall say: Speak, Lord, for your servant is listening. 10. What is it then that almighty God introduces his calling with such skill that the mind of the one called is restrained from recognizing the one who calls him; that hearing God, he thinks this master is a man; that he sends forth the calling yet conceals the cause; that he allows him to go to his master, to return so many times to the quiet of sleep, and yet does not permit the sleeper to rest? […]

Moreover, Samuel did not yet know the Lord, etc. Moreover, the Savior, whose name is God, was not yet recognized by the carnal as always knowing all the secrets of the Father, nor before He was baptized did John see and bear witness that the …

11. What is it that Eli commands the boy who was called to return to sleep, except that he shows preachers to prepare themselves through quietness of mind for receiving the gift of interior grace? And it should be noted that it says: "Return." For Samuel returns when the chosen preacher goes back from meditation on sacred Scripture to the secret of interior contemplation. Having returned, therefore, he slept, because he rested in the intention of interior contemplation.