CHRYSOSTOM . (Hom. 24. in Matt.) The Lord also shews us that faith profiteth a man nothing, if his manner of life be corrupt. Hence it follows, But he that heareth and doeth not, is like a man, that without a foundation, built an house upon the earth, &c.
BEDE . The house of the devil is the world which lieth in wickedness, (1 John 5:19.) which he builds upon the earth, because those who obey him he drags down from heaven to earth; he builds without foundation, for sin has no foundation, standing not by its own nature, for evil is without substance, which yet whatever it is, grows up in the nature of good. But because the foundation is called so from fundus, we may not unfitly understand that fundamentum is placed here for fundus. As then he who is fallen into a well is kept at the bottom of the well, so the soul falling away remains stationary, as it were, at the very bottom, as long as it continues in any measure of sin. But not content with the sin into which it is fallen, while daily sinking into worse, it can find no bottom, as it were, in the well to which it may fix itself. But every kind of temptation increasing, both the really bad and the feignedly good become worse, until at last they come to everlasting punishment. Hence it follows, Against which the stream did beat vehemently. By the force of the stream may be understood the trial of the last judgment, when both houses being finished, the wicked shall go into everlasting punishment, but the righteous into life eternal. (Mat. 25:46.)
CYRIL OF ALEXANDRIA . 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.
AUGUSTINE . (de Con. Ev. ii. 19.) Now this long discourse of our Lord, Luke begins in the same way as Matthew; for each says, Blessed are the poor. Then many things which follow in the narration of each are like, and finally the conclusion of the discourse is found to be altogether the same, I mean with respect to the men who build upon the rock and the sand. It might then easily be supposed that Luke has inserted the same discourse of our Lord, and yet has left out some sentences which Matthew has kept, and likewise put in others which Matthew has not; were it not that Matthew says the discourse was spoken by our Lord on the mountain, but Luke on the plain by our Lord standing. It is not however thought likely from this that these two discourses are separated by a long course of time, because both before and after both have related some things like, or the same. It may however have happened that our Lord was at first on a higher part of the mountain with His disciples alone, and that then he descended with them from the mount, that is, from the summit of the mountain to the flat place, that is, to some level ground, which was on the side of the mountain, and was able to hold large multitudes, and that there He stood until the crowds were gathered together to Him, and afterwards when He sat down His disciples came nearer, and to them, and the rest of the multitude who were present, He held the same discourse.