The distinct reference to Satan as the agent in removing the seed is not to be passed by lightly. Christ's words about demons have been emptied of meaning by the allegation that He was only accommodating Himself to the superstition of the times, but no explanation of that sort will do in this case. He surely commits Himself here to the assertion of the existence and agency of Satan; and surely those who profess to receive His words as the truth ought not to make light of them, in reference to so solemn and awe-inspiring a revelation.
The seed gets rather farther on the road to fruit in the second case. A thin surface of mould above a shelf of rock is like a forcing-house in hot countries. The stone keeps the heat and stimulates growth. The very thing that prevents deep rooting facilitates rapid shooting. The green spikelets will be above ground there long before they show in deeper soil. There would be many such hearers in the 'very great multitude' on the shore, who were attracted, they scarcely knew why, and were the more enthusiastic the less they understood the real scope of Christ's teaching. The disciple who pressed forward with his excited and unasked 'Master, I will follow Thee whithersoever Thou goest!' was one of such--well-meaning, perfectly sincere, warmly affected, and completely unreliable. Lightly come is lightly go. When such people forsake their fervent purposes, and turn their backs on what they have been so eagerly pursuing, they are quite consistent; for they are obeying the uppermost impulse in both cases, and, as they were easily drawn to follow without consideration, they are easily driven back with as little. The first taste of supposed good secured their giddy-pated adhesion; the first taste of trouble ensures their desertion. They are the same men acting in the same fashion at both times. Two things are marked by our Lord as suspicious in such easily won discipleship--its suddenness and its joyfulness. Feelings which are so easily stirred are superficial. A puff of wind sets a shallow pond in wavelets. Quick maturity means brief life and swift decay, as every 'revival' shows. The more earnestly we believe in the possibility of sudden conversions, the more we should remember this warning, and make sure that, if they are sudden, they shall be thorough, which they may be. The swiftness is not so suspicious if it be not accompanied with the other doubtful characteristic--namely, immediate joy. Joy is the result of true acceptance of the gospel; but not the first result. Without consciousness of sin and apprehension of judgment there is no conversion. We lay down no rules as to depth or duration of the 'godly sorrow' which precedes all well-grounded 'joy in the Lord'; but the Christianity which has taken a flying leap over the valley of humiliation will scarcely reach a firm standing on the rock. He who 'straightway with joy' receives the word, will straightway, with equal precipitation, cast it away when the difficulties and oppositions which meet all true discipleship begin to develop themselves. Fair-weather crews will desert when storms begin to blow.
The third sort of soil brings things still farther on before failure comes. The seed is not only covered and germinating, but has actually begun to be fruitful. The thorns are supposed to have been cut down, but their roots have been left, and they grow faster than the wheat. They take the 'goodness' out of the ground, and block out sun and air; and so the stalks, which promised well, begin to get pale and droop, and the half-formed ear comes to nothing, or, as the other version of the parable has it, brings 'forth no fruit to perfection.' There are two crops fighting for the upper hand on the one ground, and the earlier possessor wins. The 'struggle for existence' ends with the 'survival of the fittest'; that is, of the worst, to which the natural bent of the desires and inclinations of the unrenewed man is more congenial. The 'cares of this world' and the 'deceitfulness of riches' are but two sides of one thing. The poor man has cares; the rich man has the illusions of his wealth. Both men agree in thinking that this world's good is most desirable. The one is anxious because he has not enough of it, or fears to lose what he has; the other man is full of foolish confidence because he has much. Eager desires after creatural good are common to both; and, what with the anxiety lest they lose, and the self-satisfaction because they have, and the mouths watering for the world's good, there is no force of will, nor warmth of love, nor clearness of vision, left for better things. That is the history of the fall of many a professing Christian, who never apostatises, and keeps up a reputable appearance of godliness to the end; but the old worldliness, which was cut down for a while, has sprung again in his heart, and, by slow degrees, the word is 'choked'--a most expressive picture of the silent, gradual dying-out of its power for want of sun and air--and 'he' or 'it' 'becometh unfruitful,' relapsing from a previous condition of fruit-bearing into sterility. No heart can mature two crops. We must choose between God and Mammon--between the word and the world.