Ambrose of Milan — as excerpted in the Catena Aurea on Luke 11:33-36

“Either faith is the light, as it is written, Thy word, O Lord, is a lantern to my feet. (Ps. 119:105.) 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 and senses are enlightened, that the 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.”