Bede the Venerable — as excerpted in the Catena Aurea on Luke 11:33-36

“Our Lord here speaks of Himself, shewing that although He had said above that no sign should be given to this wicked generation but the sign of Jonas, yet the brightness of His light should by no means be hid from the faithful. He Himself indeed lights the candle, who filled the vessel of our nature with the fire of His divinity; and this candle surely He wished neither to hide from believers, nor to place under a bushel, that is, enclose it in the measure of the law, or confine it within the limits of the single nation of the Jews. But He placed it upon a candlestick, that is, the Church, for He has imprinted on our foreheads the faith of His incarnation, that they who with a true faith wish to enter the Church, might be able to see clearly the light of the truth. Lastly, He bids them remember to cleanse and purify not only their works, but their thoughts, and the intentions of the heart. For it follows, The light of the body is the eye.”