II. But the text indicates to us that AT TIMES MINISTERS LABOR IN VAIN. "Shall horses run upon the rock? will one plough there with oxen?" In a short time a ploughman feels whether the plough will go or not, and so does the minister. He may use the very same words in one place which he has used in another, but he feels in the one place great joy and hopefulness in preaching, while with another audience he has heavy work, and little hope. The plough in the last case seems to jump out of the furrow; and a bit of the share is broken off now and then. He says to himself, "I do not know how it is, but I do not get on at this," and he finds that his Master has sent him to work upon a particularly heavy soil. All laborers for Christ know that this is occasionally the case. You must have found it so in a Sunday-school class, or in a cottage meeting, or in any other gathering where you have tried to teach and preach Jesus. You have said to yourself every now and then, "Now I am ploughing a rock. Before, I turned up rich mould which a yoke of oxen might plough with ease, and a horse might even run at the work; but now the horse may tug, and the oxen may wearily toil till they gall their shoulders, but they cannot cut a furrow; the rock is stubborn to the last degree." There are such hearers in all congregations. They are as iron, and yet they are side by side with a fine plot of ground. Their sister, their brother, their son, their daughter, all these have readily felt the power of the gospel; but _they_ do not feel it. They hear it respectfully; and they so far allow it free course that they permit it to go in at one ear and out at the other, but they will have nothing more to do with it. They would not like to be Sabbath-breakers and stop away from worship; they therefore do the gospel the questionable compliment of coming where it is preached and then refusing to regard it. They are hard, hard, hard bits of rock, the plough does not touch them. Many, on the other hand, are equally hard; but it is in another way. The impression made by the word is not deep or permanent. They receive it with joy, but they do not retain it. They listen with attention, but it never comes to practice with them. They hear about repentance, but they never repent. They hear about faith, but they never believe. They are good judges of what the gospel is, and yet they have never accepted it for themselves. They will not eat; but still they insist that good bread shall be put on the table. They are great sticklers for the very things which they personally reject. They are moved to feeling; they shed tears occasionally; but still their hearts are not really broken up by the word. They go their way, and forget what manner of men they are. They are rocky-hearted through and through; all our attempts to plough them are failures.