“The light of the body is the eye: therefore when thine eye is single, thy whole body also is full of light; but when thine eye is evil, thy body also is full of darkness.”
Luke 11:34 — Greek Interlinear
Church Fathers on Luke 11:34
The Jews said, that our Lord performed His miracles not for faith, i.e. that they might believe in Him, but to gain the applause of the spectators, i.e. that He might have more followers. He refutes therefore this calumny, saying, No man, when he has lighted a candle, puts it in a secret place, neither under a bushel, but on a candlestick.
Our Lord here speaks of Himself, showing 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…
Either faith is the light, as it is written, Your word. O Lord, is a lantern to my feet. For the word of God is our faith. But a lantern cannot shine except it has received its quality from something else. Hence also the powers of our mind senses are enlightened piece of money which had been lost may be found. Let no one then place faith under the law, for the law is bound by certain limits, grace is unlimited; the law obscures, grace makes clear.