Paley's critics should however observe, that he did not himself intend the objectionable inference. Probably he never even perceived that it might be drawn from his comparison. Abstract inquiries connected with Theism, he banished to the end of his book, where they are discussed in a manner little calculated to satisfy any readers who have ever felt them as substantial difficulties.[18] But then, he would most likely have referred these persons to the writings of professed metaphysicians. It may be wise for us to take warning both by what Paley did and by what he left undone. Some deeper questions are indispensable to the argument from Design, but we shall follow his example so far as to avoid such disquisitions as were current in his day under the name of metaphysics. On the other hand we shall draw the required data from that critical Fact-philosophy of Mind and Human Nature, which forms to so many thinkers the birth-star of a new science, one amongst the rising hopes of our nineteenth century. Meantime, our business on hand is to rebut the present accusation of proving too much, brought against Paley's analogy. We shall try to complete our answer by setting his argument in the point of view under which he evidently meant it to be looked at. Either as an illustration or as a means of proof, Analogy need not hold in more than a single point; provided only that this single point is clear and well-established--resting, for example, on a moral law or a causal _nexus_. Any one who desires to make an analytical investigation into this law of inference will receive valuable aid from Ueberweg's Logic, §§ 131 and 2, particularly if compared with § 129. To a common-sense mind we may give sufficient satisfaction by adducing one or two good analogies. Thus, for instance, the duties of a religious minister are often explained by saying that he ought to be the shepherd of his flock; that is, his relation to his people ought to resemble that of the shepherd to his sheep. We all understand how truly is here expressed a world of watchful care. But are all points of the relation to be implied? May the spiritual pastor ever become the slayer or the salesman of his flock?