Gregory the Great, on Prov 9:1

“Wisdom hath built herself a house, she hath hewn her out seven pillars.”

“We may also not inappropriately interpret the 'pillars of heaven' the Churches themselves, which being many in number, constitute one Catholic Church spread over the whole face of the earth. Hence too the Apostle John writes to the seven Churches, meaning to denote the one Catholic Church replenished with the Spirit of sevenfold grace, and we know that Solomon said of the Lord, Wisdom hath builded her house, she hath hewn out her seven pillars. And the same, to make known that it was of the seven Churches he had spoken that, in going on sedulously introduced the very Sacraments themselves too, saying, She hath killed her sacrifices, she hath mingled her wine, she hath also set forth her table; she hath sent forth her maidens, that they may cry to the citadel and to the walls of the city. If any be a little one, let him come to me. For the Lord 'killed the sacrifices' by offering Himself on our behalf. He 'mingled the wine,' blending together the cup of His precepts from the historical narration and the spiritual signification. And 'He set forth His table,' i.e. Holy Writ, which with the bread of the word refreshes us when we are wearied, and come to Him away from the burthens of the world, and by its effect of refreshing strengthens us against our adversaries. He 'sent forth His maidens,' i.e. the souls of the Apostles, 'that they might cry to the citadel and the walls of the city;' in that whilst they tell of the interior life, they lift us up to the high walls of the City Above, which same walls, surely, except any be humble they do not ascend. Whence it is there added by that same Wisdom; If any be a little one, let him come unto Me. As if she said in plain words; 'Whosoever accounts himself great in his own eyes, contracts the avenue of his approach unto Me; for there is a loftier reaching unto Me in proportion as the mind of each one is in himself the more truly abased.'”

Imported from an open dataset — not yet checked against the printed edition.