The seed sown on the trodden footpath running across the field never sinks below the surface. It lies there, and has no real contact, nor any chance of growth. It must be in, not on, the ground, if its mysterious power is to be put forth. A pebble is as likely to grow as a seed, if both lie side by side, on the surface. Is not this the description of a mournfully large proportion of hearers of God's truth? It never gets deeper than their ears, or, at the most, effects a shallow lodgment on the surface of their minds. So many feet pass along the path, and beat it into hardness, that the truth has no chance to take root. Habitual indifference to the gospel, masked by an utterly unmeaning and unreal acceptance of it, and by equally habitual decorous attendance on its preaching, is the condition of a dreadfully large proportion of church-goers. Their very familiarity with the truth robs it of all penetrating power. They know all about it, as they suppose; and so they listen to it as they would to the clank of a mill-wheel to which they were accustomed, missing its noise if it stops, and liking to be sent to sleep by its hum. Familiar truth often lies 'bedridden in the dormitory of the soul, beside exploded errors.' And what comes of this idle hearing, without acceptance or obedience? Truth which is common, and which a man supposes himself to believe, without having ever reflected on it, or let it influence conduct, is sure to die out. If we do not turn our beliefs into practice they will not long be our beliefs. Neglected impressions fade; the seed is only safe when it is buried. There are flocks of hungry, sharp-eyed, quick-flying thieves ready to pounce down on every exposed grain. So Mark uses here again his favourite 'straightway' to express the swift disappearance of the seed. As soon as the preacher's voice is silent, or the book closed, the words are forgotten. The impression of a gliding keel on a smooth lake is not more evanescent. 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.