Matthew 13:33

Or otherwise; The Lord compares Himself to leaven; for leaven is produced from meal, and communicates the power that it has received to a heap of its own kind. The woman, that is the Synagogue, taking this leaven hides it, that is by the sentence of death; but it working in the three measures of meal, that is equally in the Law, the Prophets, and the Gospels, makes all one; so that what the Law ordains, that the Prophets announce, that is fulfilled in the developements of the Gospels. But many, as I remember, have thought that the three measures refer to the calling of the three nations, out of Shem, Ham, and Japhet. But I hardly think that the reason of the thing will allow this interpretation; for though these three nations have indeed been called, yet in them Christ is shown and not hidden, and in so great a multitude of unbelievers the whole cannot be said to be leavened.

After this He adds the leaven to this similitude, saying, "The Kingdom of Heaven is like unto leaven, which a woman took, and hid in three measures of meal, until the whole was leavened." For as this converts the large quantity of meal into its own quality, even so shall ye convert the whole world. And see His wisdom, in that He brings in things natural, implying that as the one cannot fail to take place, so neither the other. For say not this to me: "What shall we be able to do, twelve men, throwing ourselves upon so vast a multitude?" Nay, for this very thing most of all makes your might conspicuous, that ye mix with the multitude and are not put to flight. As therefore the leaven then leavens the lump when it comes close to the meal, and not simply close, but so as to be actually mixed with it (for He said not, "put," simply, but "hid"); so also ye, when ye cleave to your enemies, and are made one with them, then shall ye get the better of them. And as the leaven, though it be buried, yet is not destroyed, but by little and little transmutes all into its own condition; of like sort will the event be here also, with respect to the gospel. Fear ye not then, because I said there would be much injurious dealing: for even so shall ye shine forth, and get the better of all. But by "three measures," here, He meant many, for He is wont to take this number for a multitude. And marvel not, if discoursing about the kingdom, He made mention of a little seed and of leaven; for He was discoursing with men inexperienced and ignorant, and such as needed to be led on by those means. For so simple were they, that even after all this, they required a good deal of explanation. Where now are the children of the Greeks? Let them learn Christ's power, seeing the verity of His deeds, and on either ground let them adore Him, that He both foretold so great a thing, and fulfilled it. Yea, for it is He that put the power into the leaven. With this intent He mingled also with the multitude those who believe on Him, that we might impart unto the rest of our wisdom. Let no one therefore reprove us for being few. For great is the power of the gospel, and that which hath been once leavened, becomes leaven again for what remains. And as a spark, when it hath caught in timber, makes what hath been burnt up already increase the flame, and so proceeds to the rest; even so the gospel likewise. But He said not fire, but "leaven." Why might this be? Because in that case the whole effect is not of the fire, but partly of the timber too that is kindled, but in this the leaven doth the whole work by itself. Now if twelve men leavened the whole world, imagine how great our baseness, in that when we being so many are not able to amend them that remain; we, who ought to be enough for ten thousand worlds, and to become leaven to them.

The 'satum' is a kind of measure in use in Palestine containing one modius and a half. Or otherwise; The woman who takes the leaven and hides it, seems to me to be the Apostolic preaching, or the Church gathered out of divers nations. She takes the leaven, that is, the understanding of the Scriptures, and hides it in three measures of meal, that the three, spirit, soul, and body, may be brought into one, and may not differ among themselves. Or otherwise; We read in Plato that there are three parts in the soul, reason, anger, and desire; (R. P. iv. 439. λογιστιχὸν, ἐχιδνμπτιχὸυ, θνμοειδὲς) so we also if we have received the evangelic leaven of Holy Scripture, may possess in our reason prudence, in our anger hatred against vice, in our desire love of the virtues, and this will all come to pass by the Evangelic teaching which our mother Church has held out to us. I will further mention an interpretation of some; that the woman is the Church, who has mingled the faith of man in three measures of meal, namely, belief in the Father, the Son, and the Holy Spirit; which when it has fermented into one lump, brings us not to a threefold God, but to the knowledge of one Divinity. This is a pious interpretation; but parables and doubtful solutions of dark things, can never bestow authority on dogmas.

(Quæst. Ev. i. 12.) Or, The leaven signifies love, because it causes activity and fermentation; by the woman He means wisdom. By the three measures He intends either those three things in man, with the whole heart, with the whole soul, with the whole mind; or the three degrees of fruitfulness, the hundred-fold, the sixty-fold, the thirty-fold, or those three kinds of men, Noe, Daniel, and Job.

(ubi sup.) The birds lodge in its branches, when holy souls that raise themselves aloft from thoughts of earth on the wings of the virtues, breathe again from the troubles of this life in their words and comfortings.