Theophylact of Ohrid
Catena Aurea · Lukasevangelium 12
In the mean time, when there were gathered together an innumerable multitude of people, insomuch that they trode one upon another, he began to say unto his disciples first of all, Beware ye of the leaven of the Pharisees, which is hypocrisy. For there is nothing covered, that shall not be revealed; neither hid, that shall not be known. Therefore whatsoever ye have spoken in darkness shall be heard in the light; and that which ye have spoken in the ear in closets shall be proclaimed upon the housetops.
Or this is addressed to the Pharisees; as if He said, O Pharisees, what you have spoken in darkness, that is, all your endeavours 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.