Cyril of Alexandria
Catena Aurea · Lukasevangelium 6
And why call ye me, Lord, Lord, and do not the things which I say? Whosoever cometh to me, and heareth my sayings, and doeth them, I will shew you to whom he is like: He is like a man which built an house, and digged deep, and laid the foundation on a rock: and when the flood arose, the stream beat vehemently upon that house, and could not shake it: for it was founded upon a rock. But he that heareth, and doeth not, is like a man that without a foundation built an house upon the earth: against which the stream did beat vehemently, and immediately it fell; and the ruin of that house was great.
Or they build upon the earth without foundation, who upon the quicksand of doubt, which relates to opinion, lay the foundation of their spiritual building, which a few drops of temptation wash away.