Matthew 13:21

Note that which is said, is straightway offended. There is then some difference between him who, by many tribulations and torments, is driven to deny Christ, and him who at the first persecution is offended, and falls away...

"That which is sown upon the stony places," saith He, "the same is he that heareth the word, and anon with joy receiveth it. Yet hath he not root in himself, but dureth for a while; but when tribulation or persecution ariseth because of the word, by and by he is offended! When any one," so He saith, "heareth the word of truth and understandeth it not, then cometh the wicked one, and catcheth that which was sown out of his heart. This is he that is sown by the wayside." Now it is not the same thing for the doctrine to wither away, when no man is evil entreating, or disturbing its foundations, as when temptations press upon one. But they that are likened to the thorns, are much more inexcusable than these. In order then that none of these things may befall us, let us by zeal and continual remembrance cover up the things that are told us. For though the devil do catch them away, yet it rests with us, whether they be caught away; though the plants wither, yet it is not from the heat this takes place (for He did not say, because of the heat it withered, but, "because it had no root"); although His sayings are choked, it is not because of the thorns, but of them who suffer them to spring up. For there is a way, if thou wilt, to check this evil growth, and to make the right use of our wealth. Therefore He said not, "the world," but "the care of the world;" nor "riches," but "the deceitfulness of riches." Let us not then blame the things, but the corrupt mind. For it is possible to be rich and not to be deceived; and to be in this world, and not to be choked with its cares. For indeed riches have two contrary disadvantages; one, care, wearing us out, and bringing a darkness over us; the other, luxury, making us effeminate. And well hath He said, "The deceitfulness of riches." For all that pertains to riches is deceit; they are names only, not attached to things. For so pleasure and glory, and splendid array, and all these things, are a sort of vain show, not a reality. And these things He saith, least they that followed Him should suppose that hearing is sufficient for salvation. And wherefore, one may say, did He not put the other vices also, such as lust, vainglory? In speaking of "the care of this world, and the deceitfulness of riches," He set down all. Yea, both vainglory and all the rest belong to this world, and to the deceitfulness of riches; such as pleasure, and gluttony, and envy, and vainglory, and all the like. But He added also the "way" and the "rock," signifying that it is not enough to be freed from riches only, but we must cultivate also the other parts of virtue. For what if thou art free indeed from riches, yet are soft and unmanly? and what if thou art not indeed unmanly, but art remiss and careless about the hearing of the word? Nay, no one part is sufficient for our salvation, but there is required first a careful hearing, and a continual recollection; then fortitude, then contempt of riches, and deliverance from all worldly things. In fact, His reason for putting this before the other, is because the one is first required (for "How shall they believe except they hear?" just as we too, except we mind what is said, shall not be able so much as to learn what we ought to do): after that, fortitude, and the contempt of things present. Hearing therefore these things, let us fortify ourselves on all sides, regarding His instructions, and striking our roots deep, and cleansing ourselves from all worldly things. But if we do the one, neglecting the other, we shall be nothing bettered; for though we perish not in one way, yet shall we in some other. For what signifies our not being ruined by riches, if we are by indolence: or not by indolence, if we are by softness. For so the husbandman, whether this way or that way he lose his crop, equally bewails himself. Let us not then soothe ourselves upon our not perishing in all these ways, but let it be our grief, in whichever way we are perishing. And let us burn up the thorns

It follows, That which is sown upon the rock, is he that heareth the word, &c. For the seed or word of God, which is sown in the rock, that is, in the hard and untamed heart, can bring forth no fruit, inasmuch as its hardness is great, and its desire of heavenly things small; and because of this great hardness, it has no root in itself.