Job 38:6

“And who created at the same time the morning stars?” that is, those stars that also rise and appear in the evening. But in a different sense [we may intend], when we refer to these stars to the substances that are separated from our senses, their generation does not agree with the nature of angels. Therefore, we say that Christ is signified through the term morning and the apostles through stars; and the teachers, sons of the angels, are defined as participants in the angelic nature.

17. What else do we understand by the foundations of this earth, but the teachers of Holy Church? For columns are raised on the bases, but on the columns the weight of the whole fabric is raised. Holy teachers are then not improperly designated by the name of bases. For while they preach what is right, and in life accord with their preaching, they uphold the whole weight of the Church by the fixed gravity of their manners; they endure sharp assaults from unbelievers, and, whatever is dreaded by the faithful as difficult in the precepts of God, they show to be easy by the examples of their works. Whence also, when the tabernacle was being fixed as the type of the Church, it is well said to Moses, Thou shalt make four columns, and their bases thou shalt cover with silver. [Ex. 26, 32] For what else is understood by silver but the brightness of the Divine word? As it is written; The words of the Lord are pure words, silver tried in the fire, purged from the earth, purified seven times. [Ps. 12, 6] Bases therefore covered with silver support the four columns of the tabernacle; because preachers of the Church, adorned with the Divine word, in order to set themselves forth as an example to all, bear the words of the four Evangelists in their mouth, and in their works.
18. Prophets also can be signified by bases; for when they first spoke openly of the Incarnation of the Lord, we behold them rising as bases from the foundation, and bearing the weight of the superimposed fabric. Whence also, when the Lord ordered the boards of the tabernacle to be erected, He ordered Moses that their bases should be cast in silver. For what are signified by the boards, but Apostles spread out in their extended preaching to the world, and what by the bases of silver but the Prophets: who being themselves firm and molten sustain the boards placed upon them? Because while the life of the Apostles is instructed by their preaching, it is also strengthened by their authority. Whence also the bases put together in pairs are placed under the separate boards. Because when the holy prophets agree in their words concerning the Incarnation of the Mediator, they edify without doubt the subsequent preachers of the Church: and when they disagree not with themselves, they establish them more firmly on themselves. But it is not improperly ordered that the bases, by which the Prophets are signified, should be cast of silver. For the brightness of silver is preserved by its being used; when not used it is turned into blackness. The sayings also of the Prophets, because they were not held in the use of spiritual knowledge, remained, as it were, in blackness before the coming of the Mediator, because they could not be understood by reason of their obscurity. But after the Mediator, on His coming, wiped them before our eyes with the hand of His Incarnation, whatever light was lurking therein shone forth, and He brought into use the meaning of preceding fathers, because He expounded words by events. Whether He signifies then the prophets, or the teachers who succeed them in the latter times, by the expression ‘bases,’ let Him say; Whereupon are the bases thereof fastened? Thou understandest, except upon Me, Who hold all things marvellously together, and confer at the first an inward existence on things that are good without. For he who attributes what is good to himself, is not a solid basis; for whilst he rests not on the foundation, he is by his own weight precipitated to the bottom. But since many things are now being said concerning the building of Holy Church, the mind seeks to hear, with what virtue hostile nations are united together, that is, with what skill the different buildings of this house are fitted together. It follows;
Or who hath laid the corner stone thereof?
19. It is now clear to all by Divine grace, Whom Holy Scripture calls the corner Stone. Him in truth, Who taking into Himself from one side the Jewish, and from the other the Gentile people, unites, as it were, two walls in the one fabric of the Church; Him of Whom it is written, He hath made both one; [Eph. 2, 14] Who exhibited Himself as the corner Stone, not only in things below, but in things above; because He united on earth the nations of the Gentiles to the people of Israel, and both together to Angels in heaven. For at His birth the Angels exclaimed, On earth peace to men of good will. [Luke 2, 14] For they would not offer their joys to men of peace as a great thing at the birth of the King, if they were not at variance with each other. Of this Stone it is said by the Prophet; The Stone which the builders rejected, is made the head of the corner. [Ps. 118, 22] Jechonias the king typified the Stone, whom Matthew when describing fourteen generations, reckoned twice. [Matt. 1, 11. 12.] For him, whom he had inserted as the end of the second generation, he inserted again at the beginning of the third. For he himself was removed into Babylonia with the people of Israel; for while he is led from one to the other, he is not improperly counted twice over for the side of each wall. And by the bending of this migration he designates the corner stone. For where the order is diverted from its right course to go into a different direction, it makes, as it were, a corner. He could therefore rightly be counted twice; for he showed as it were two sides of himself along either wall. Whence also he properly represented Him, Who born in Judaea, and gathering together the Gentiles, went as it were from Jerusalem to Babylonia, and bound together in His own Person, by the art of charity, that building of faith which before was rent asunder by the animosity of discord.
But these things which have been said, as descriptive of Holy Church, it seems good to repeat briefly in a moral sense. For it is right for us to be brought back to our own hearts by those things which we know were said to blessed Job; because the mind then understands more truly the words of God, when it searches for itself therein.

31. For the bases of each single soul are its intentions. For as the fabric rests on columns, but the columns on bases, so is our life based upon its virtues, but our virtues on our inmost intention. And because it is written, Other foundation can no man lay than that is laid, which is Jesus Christ; [1 Cor. 3, 11] the bases are then on the foundation, when our intentions are firmly fixed on Christ. But in vain do the bases raise upon themselves lofty edifices, if they themselves do not stand firm on the solid foundation, because men doubtless perform in vain their deeds, however great, if the intentions of their hearts are turned aside beyond the certainty of eternity, and if they seek not the rewards of the true life, and they raise up upon themselves heavier losses of ruin, the loftier edifices they pile up beyond the foundation. For when they aim not at the rewards of eternal life, the more they raise themselves, as it were, in virtue, the deeper do they fall into the pitfall of vainglory. We must not consider then what the bases support, but where they are supported: because in truth the hearts of men examine, by Divine help, not only what they do, but what they aim at in their doings. Whence, when Paul was describing the strict Judge, and was speaking of the goodness of actions, saying, Who will render to every man according to his deeds; to these indeed according to their patience in well-doing, glory and incorruption; [Rom. 2, 6. 7.] because, having spoken of patience in well doing, he had mentioned the whole fabric, as it were, of Elect actions, he immediately enquired accurately where the bases of this fabric rested, saying, To those who seek for glory and honour and incorruption, eternal life. As if he were plainly saying, Although certain persons exhibit patience in well-doing, yet they receive not glory and incorruption, if they place not the intentions of their heart, that is the bases of the fabric, on the foundation. Because, namely, God dwells not in the edifice even of an honest life, which, placed without Himself, He Himself does not support.
32. Because, therefore, the intentions of every Elect soul rest on the hope of eternity, it is rightly said of this earth by the voice of the Lord, Whereupon are the bases thereof fastened? As if He were plainly saying, Except upon Me. For while every righteous soul aims at this, every thing it does temporally, it doubtless builds on Me for no temporal purpose. But since we are then more solidly built on the foundation, when we both follow the words of God in their outward precepts, and consider them with deeper understanding in their inmost meanings, it is rightly subjoined,
Or who hath laid the corner stone thereof?
33. For the ‘corner stone’ is a twofold understanding of Holy Scripture. And it is laid by Divine power, when it is not, by strict judgment, bound with the darkness of its ignorance, but enjoys a kind of liberty, whereas it knows sufficiently the precepts of God, either to follow their outward commands, or to learn by contemplation their inner meaning. To which our understanding would never attain, if He, our Creator, did not come to take our nature. For He is called in one sense ‘a corner stone,’ because He united in Himself two peoples, and in another, because He set forth in Himself patterns of both lives, that is, the active and the contemplative, united together. For the contemplative life differs very much from the active. But our Redeemer by coming Incarnate, while He gave a pattern of both, united both in Himself. For when He wrought miracles in the city, and yet continued all night in prayer on the mountain, [Luke 6, 5] He gave His faithful ones an example, not to neglect, through love of contemplation, the care of their neighbours, nor again to abandon contemplative pursuits, from being too immoderately engaged in the care of their neighbours; but so to keep together their mind, in applying it to the two cases, that the love of their neighbour might not interfere with the love of God, nor again the love of God cast out, because it transcends, the love of their neighbour. Because then the Mediator between God and man was manifested to the heart of man, when it knew not what it was doing, in order by His doings to set in order things transitory, and to show by contemplation whence all things depended, it is rightly said, Or who hath laid the earner stone thereof? As if the Lord were openly saying, Except Myself, Who manifested in time for the salvation of men, Him Whom I begat as My only Son without time, that men might learn in His life that even diverse pursuits are not discordant. And it must be observed, that He does not state that He sent Him out, but that He sent Him away [‘non emisisse, sed dimisisse.’]. Because in truth the Son, in taking human nature, descended from a lofty, to the lowest, estate. But since even the Elect Angels, who are not redeemed by this mystery, yet marvelled at the mystery of this Incarnation, [1 Pet. 1, 12]