Genesis 24:63

Are you not yet moved to understand that these words are spoken spiritually? Or do you think that it always happens by chance that the patriarchs go to wells and obtain their marriages at waters? He who thinks in this way is "a sensual man" and "does not perceive these things which are of the Spirit of God." But let him who wishes remain in these understandings, let him remain "a sensual man." I, following Paul the apostle, say that these things are "allegories," and I say that the marriages of the saints are the union of the soul with the Word of God: "For he who joins himself to the Lord is one spirit."But it is certain that this union of the soul with the Word cannot come about otherwise than through instruction in the divine books, which are figuratively called wells. If anyone should come to these and draw from these waters, that is, by meditating on these words should perceive the deeper sense and meaning, that one will find a marriage worthy of God; for [that person's] soul is united with God.

That field contained a figure of the world. Isaac went out into the field, because Christ was to come into the world; Isaac toward the evening of the day, Christ at the end of the world. "He went out," it says, "to meditate."

He withdrew himself and cleansed himself from the vices of this world, elevating his soul like Isaac in the field, or (as others have it) walking freely.

(Verses 62 and 63.) And he himself dwelt in the land of the south: and Isaac went forth to meditate in the field towards evening. The land of the south signifies Gerar, to which he had once been led by his father to be sacrificed. But when it says, And he went forth to meditate in the field, which in Greek is called ἀδολεσχῆσαι, in Hebrew it is read: And Isaac went forth to speak in the field, the evening already declining.

Merciful providences are then doubly comfortable, when they find us in the way of our duty: some think Isaac was now praying for good success in this affair, and meditating upon that which was proper to encourage his hope in God concerning it; and now when he sets himself, as it were, upon his watch-tower, to see what God would answer him, he sees the camels coming.