5. I do especially desire you to observe, that the resolving of practical cases of conscience, and the reducing of theoretical knowledge into serious christian practice, and promoting a skilful facility in the faithful exercise of universal obedience, and holiness of heart and life, is the great work of this treatise; and that where I thought it needful, the cases are reduced to express questions and answers. But had I done so by all, many such volumes would have been too little; and therefore I thought the directing way most brief and fit for christian practice; for if you mark them, you will find few directions in the book, which may not pass for the answer of an implied question or case of conscience; and when I have given you the answer in a direction, an ingenious reader can tell what question it is that is answered. And so, many hundred cases are here resolved, especially in the two first parts, which are not interrogatively named.
6. And I must do myself the right as to notify the reader, that this treatise was written when I was (for not subscribing, declaring, &c.) forbidden by the law to preach, and when I had been long separated far from my library and from all books, saving an inconsiderable parcel which wandered with me, where I went; by which means this book hath two defects: 1. It hath no cases of conscience, but what my bare memory brought to hand: and cases are so innumerable, that it is far harder, methinks, to remember them, than to answer them; whereby it came to pass that some of the ecclesiastical cases are put out of their proper place, because I could not seasonably remember them. For I had no one casuist but Amesius with me. But (after about twelve years' separation) having received my library, I find that the very sight of Sayrus, Fragoso, Roderiquez, Tolet, &c. might have helped my memory to a greater number. But perhaps these will be enough for those that I intend them for. 2. And by the same cause the margin is unfurnished of such citations as are accounted an ornament, and in some cases are very useful. The scraps inserted out of my few trivial books at hand being so mean, as that I am well content (except about Monarchy, Part IV.) that the reader pass them by as not worthy of his notice.
And it is like that the absence of books will appear to the reader's loss in the materials of the treatise; but I shall have this advantage by it, that he will not accuse me as a plagiary. And it may be some little advantage to him, that he hath no transcript of any man's books, which he had before; but the product of some experience, with a naked, unbiassed perception of the matter or things themselves.
7. Note also, that the Third and Fourth Parts are very much defective of what they should contain, about the power and government of God's officers in church and state; of which no readers will expect a reason but strangers, whose expectations I may not satisfy. But as I must profess, that I hope nothing here hath proceeded from disloyalty, or disrespect to authority, government, unity, concord, peace, or order; or from any opposition to faith, piety, love, or justice; so if, unknown to me, there be any thing found here that is contrary or injurious to any one of these, I do hereby renounce it, and desire it may be taken as non scriptum.
II. The ends and uses for which I wrote this book are these: 1. That when I could not preach the gospel as I would, I might do it as I could. 2. That three sorts might have the benefit, as followeth.
1. That the younger and more unfurnished and unexperienced sort of ministers, might have a promptuary at hand, for practical resolutions and directions on the subjects that they have need to deal in. And though Sayrus and Fragoso have done well, I would not have us under a necessity of going to the Romanists for our ordinary supplies. Long have our divines been wishing for some fuller casuistical tractate: Perkins began well; Bishop Sanderson hath done excellently de juramento; Amesius hath exceeded all, though briefly. Mr. David Dickson hath put more of our English cases about the state of sanctification, into Latin, than ever was done before him. Bishop Jeremy Taylor hath in two folios but begun the copious performance of the work. And still men are calling for more, which I have attempted: hoping that others will come after, and do better than we all.
If any call it my pride, to think that any ministers or students are so raw as to need any thing that I can add to them, let him but pardon me for saying that such demure pleadings for a feigned humility, shall not draw me to a confederacy with blindness, hypocrisy, and sloth, and I will pardon him for his charge of pride.
It is long ago since many foreign divines subscribed a request, that the English would give them in Latin a Sum of our Practical Theology, which Mr. Dury sent over, and twelve great divines of ours wrote to Bishop Usher, (as Dr. Bernard tells you in his Life,) to draw them up a form or method. But it was never done among them all. And it is said, that Bishop Downame at last undertaking it, died in the attempt. Had this been done, it is like my labour might have been spared. But being undone, I have thus made this essay. But I have been necessitated to leave out much, (about conversion, mortification, self-denial, self-acquaintance, faith, justification, judgment, glory, &c.) because I had written of them all before.
2. And I thought it not unuseful to the more judicious masters of families, who may choose and read such parcels to their families, as at any time the case requireth. And indeed I began it rudely, with an intention of that plainness and brevity which families require; but finding that it swelled to a bigger bulk than I intended, I was fain to write my "Life of Faith," as a breviate and substitute, for the families and persons that cannot have and use so large a volume: presupposing, my "Directions for sound Conversion," for "Weak Christians," and for "Peace of Conscience," printed long ago.