Mark 4:15

For as the good olive, if neglected for a certain time, if left to grow wild and to run to wood, does itself become a wild olive; or again, if the wild olive be carefully tended and grafted, it naturally reverts to its former fruit-bearing condition: so men also, when they become careless, and bring forth for fruit the lusts of the flesh like woody produce, are rendered, by their own fault, unfruitful in righteousness. For when men sleep, the enemy sows the material of tares; and for this cause did the Lord command His disciples to be on the watch. And again, those persons who are not bringing forth the fruits of righteousness, and are, as it were, covered over and lost among brambles, if they use diligence, and receive the word of God as a graft, arrive at the pristine nature of man-that which was created after the image and likeness of God.

Take care that the seed does not fall by the wayside, lest the evil spirit come and take the word from memory.

These are those who are beside the way where the word is sown. And when they hear, Satan immediately comes and takes away the word that was sown in their hearts, etc. In this explanation of the Lord, the entire distance of those who could hear the word of salvation but cannot reach salvation is comprehended. For there are those who do not deign to grasp the word they hear with any faith, understanding, or even any opportunity for trying usefulness. In whose undisciplined and hard hearts the sown word is immediately snatched away by unclean spirits, like birds seizing the seed from the trampled path of life. There are those who both recognize the usefulness of the heard word and taste the desire, but they are hindered from reaching what they approve by others who terrifyingly oppose the way, while others by flattering prosperity delay. The Lord compares the former to rocky ground and the latter to thorny ground. Clearly, the Gentiles are excluded, who do not even deserve to hear the words of life. And it should not seem strange why the Lord compared riches to thorns, since thorns fight and riches delight. They are rightly called thorns, because they tear the mind with the pricks of their thoughts. And when they lead to sin, they wound it like an inflicted wound causing it to bleed. But even apart from the stings of vices, the desire for riches devastates the mind greatly and does not allow it to be secure. For when someone vigilantly and anxiously watches by what order or art to acquire what they do not yet have, or by what foresight to preserve what they have already acquired, or finally by what glory and dignity to enjoy the abundance of acquired things, how necessary is it that the miserable mind is ulcerated by the stings of cares every hour? Hence, the Lord aptly, intending to call riches thorns in the exposition, preceded with miseries, saying: "Others are sown among thorns, these are those who hear the word: and the cares of the world, and the deceitfulness of riches, and the desires for other things entering in choke the word, and it becomes unfruitful." "The cares," he says, "of the world and the deceitfulness of riches." For whoever is deceived by the vain desire for riches, it is necessary that the accompanying or even preceding continuous misery of cares afflict him. For what is more miserable than those who, the more they have, the more they need, and the less they seem to have of themselves? According to what a certain poet mocking the lovers of money said: "Love of money grows as much as money itself grows." (Juvenal) And how much happier are those not only in the desire for true riches but also in the very contempt of false ones, who truly confess themselves to be as having nothing and yet possessing all things? Well did he say: "And the cares of the world and the deceitfulness of riches," and added: "And the desires for other things." For the Scripture commands: "Desiring wisdom, keep the commandments, and God will provide it for you." And again it says: "Blessed is the man who fears the Lord, he greatly delights in his commandments." (Psalm 112) On the other hand, whoever, neglecting wisdom and despising the commandments of the Lord, wanders by desiring other things, can neither receive the fruit of wisdom nor attain the joy of true blessedness. For such desires choke the word because with their importunate thoughts they strangle the throat of the mind. And while they do not allow good desire to enter the heart, they kill as it were the passage of vital breath. Whence by just judgment it happens that as much as they desire other things, so much they are far from that poverty of spirit and desire by which they long to be dissolved and to be with Christ (Philippians 1). But rather, the wretched one fears that it will truly happen to him, to be dissolved from this life and to be with the devil.

(ubi Sup.) But in this exposition of the Lord there is embraced the whole range of those who might hear the words of truth, but are unable to attain to salvation. For there are some to whom no faith, no intellect, nay no opportunity of trying its usefulness, can give a perception of the word which they hear; of whom He says, And these are by the wayside. For unclean spirits take away at once the word committed to their hearts, as birds carry away the seed of the trodden way.

Here three classes of people are indicated in whom the word is lost: some are inattentive, these are signified by the phrase "by the road"; others are fainthearted, these are understood by the phrase "on rocky ground"; the third are lovers of pleasure, signified by the phrase "among thorns."