By abandoning, for the purposes of exposition, the order in which the parables have been recorded, and adopting a classification on the basis of contents or form, some incidental advantages are obtained; especially some otherwise necessary repetitions are avoided, and some subordinate relations are by the juxtaposition more easily observed; but the loss is, I apprehend, much greater than the gain. The temptation to bend the freely-growing branches of the parable, that they may take their places in the scheme, is by this method greatly increased; while historical sequences and logical relations, lying more or less concealed in the record, are in a great measure thrown away. Accordingly, I prefer the method of maintaining in the exposition the order which the evangelists have adopted in the narrative. Besides the advantage of preserving in all cases the historical circumstances whence the parable sprung, we discover, as we follow this track, several groups associated together by the Lord in his ministry, for the sake of their reciprocal relations, and reverently preserved in their places by the evangelical historians. The seven in Matt. xiii., and the three in Luke xv., constitute the chief of those dogmatic groupings formed to our hand in the ministry of the Lord. I refer to them here as examples, but defer the exposition of their sequences and relations, until it can be presented with greater advantage in connection with the examination of their contents. A question, on some of its sides difficult, meets us here, regarding the reason why the Lord employed parables in the prosecution of his ministry. On the one hand, it is certainly true, as may be proved from all history, that comparisons between material and moral facts or laws, spring up naturally in human converse; and further, that the truth expressed in parables, if not in all cases immediately palpable, is better fitted both to arrest attention at first, and to imprint the lesson permanently on the learner's memory. But the use and usefulness of the parable in this respect are obvious and undisputed; it makes spiritual truth more attractive and more memorable. The difficulty does not lie on this side; it adheres to a second function of the parable, in some respects the opposite of the first,--the function of concealing the doctrine in judgment from closed eyes and hardened hearts. In some instances and to some extent, the parables, while they conveyed the doctrine to one portion of the audience, concealed it from another. In those cases "they are like the husk which preserves the kernel _from_ the indolent, and _for_ the earnest."[6] It is the method, not unknown in other departments of the divine government, of making the same fact or law at once profitable to the humble, and punitive to the proud. Not only the Lord's word, but also the Lord himself, partakes of this twofold character, and produces these diverse effects; the same rock on