Luke 12:3

The Pharisees sought indeed to catch Jesus in His talk, that they might lead away the people from Him. But this design of theirs is reversed. For the people came all the more to Him gathered together by thousands, and so desirous to attach themselves to Christ, that they pressed one upon another. So mighty a thing is truth, so feeble every where deceit. Whence it is said, And when there were gathered together a great multitude, insomuch that they bode upon one another, he began to say to his disciples, Beware you of the leaven of tile Pharisees, which is hypocrisy.

For they were false accusers; therefore Christ warned His disciples against them.

When leaven is praised it is as composing the bread of life, but when blamed it signifies a lasting and bitter maliciousness.

He calls their hypocrisy leaven, as perverting and corrupting the intentions of the men in whom it has sprung up. For nothing so changes the characters of men as hypocrisy.

For as a little leaven leavens a whole lump of meal, so hypocrisy will rob the mind of all the purity and integrity of its virtues.

Our Lord has introduced a most forcible argument for preserving simplicity, and being zealous for the faith, that we should not after the manner of faithless Jews put one thing in practice, while in words we pretend another, namely, that at the last day the hidden thoughts accusing or else excusing one another, shall be seen to reveal the secrets of our mind. Whence it is added, There is nothing hid which shall not be revealed.

He either then says this concerning that time when God shall judge the secrets of men, or He says it because however much a man may endeavor to hide the good deeds of another by discredit, good of its own nature cannot be concealed.

As if He says to His disciples, Although now some call you deceivers and wizards, time shall reveal all things and convict them of calumny, while it makes known your virtue. Therefore whatsoever things I have spoken to you in the small corner of Palestine, these boldly and with open brow, casting away all fear, proclaim to the whole world. And therefore He adds, Whatsoever you have spoken in darkness shall be heard in light.

Or He says this, because all the things which the Apostles of old spoke and suffered amid the darkness of oppression and the gloom of the prison, are now that the Church is made known through the world and their acts are read, publicly proclaimed. The words, shall be proclaimed on the housetops, are spoken according to the manner of the country of Palestine, where they are accustomed to live on the housetops. For their roofs were not after our way raised to a point, but flat shaped, and level at the top. Therefore He says, proclaimed on the housetops; that is, spoken openly in the hearing of all men.

Or this is addressed to the Pharisees; as if He said, O Pharisees, what you have spoken in darkness, that is, all your endeavors to tempt me in the secrets of your hearts, shall be heard in the light, for I am the light, and in My light shall be known whatsoever your darkness devises. And what you have spoken in the ear and in closets, that is, whatsoever in whispers you have poured into one another’s ears, shall be proclaimed on the housetops, that is, was as audible to me as if it had been cried aloud on the housetops. Herein also you may understand that the light is the Gospel, but the housetop the lofty souls of the Apostles. But whatever things the Pharisees plotted together, were afterwards divulged and heard in the light of the Gospel, the great Herald, the Holy Spirit, presiding over the souls of the Apostles.

The Gnostic, then, is impressed with the closest likeness, that is, with the mind of the Master; which He being possessed of, commanded and recommended to His disciples and to the prudent. Comprehending this, as He who taught wished, and receiving it in its grand sense, he teaches worthily “on the housetops” those capable of being built to a lofty height; and begins the doing of what is spoken, in accordance with the example of life. For He enjoined what is possible. And, in truth, the kingly man and Christian ought to be ruler and leader. For we are commanded to be lords over not only the wild beasts without us, but also over the wild passions within ourselves.