_Direct._ VIII. When you detect any ancient error or corruption, inquire into its original; and see whether reformation consist not rather in a restitution of the primitive state, than in an extirpation of the whole. Even in popery itself there are many errors and ill customs, which are but the corruption of some weighty truth, and the degenerating of some duty of God's appointment; and to reduce all, in such cases, to the primitive verity, is the way of wise and true reformation; and not to throw away that which is God's, because it is fallen into the dirt of human depravation. But in cases where all is bad, there all must be rejected.
_Direct._ IX. Pretend not to truth and orthodoxness against christian love and peace; and so follow truth, as that you lose not love and peace by it; "as much as in you lieth, live peaceably with all men," Rom. xii. 18. Charity is the end of truth, 1 Cor. xiii. and it is a mad use of means, to use them against the end. Make sure of the sincerity of your charity, and hold it fast; and then no error that you hold will be destructive to you: but if you know more than others, and use your knowledge to the weakening of your love, you are but (as our first parents) deceived and destroyed by a desire of fleshly, uneffectual knowledge. Such "knowledge puffeth up, but charity edifieth," 1 Cor. viii. 1. To contend for truth, to the loss of love in yourselves, and the destruction of it among others, is but to choke yourselves with excellent food, and to imitate that orthodox, catholic physician, that gloried that he killed his patients _secundem artem_, by the most accurate method and excellent rules of art that men could die by.
_Direct._ X. Pretend no truth against the power and practice of godliness.[123] For this also is its proper end; if it be not truth that is according to godliness, it is no truth worthy our seeking or contending for. And if it be contrary to godliness in itself, it is no truth at all; therefore if it be used against godliness, it is used contrary to the ends of truth. Those men that suppress or hinder the means of knowledge, and holiness, and concord, and edification, under pretence of securing, defending, or propagating the orthodox belief, will find one day, that God will give them as little thanks for their blind, preposterous zeal for truth, as a tender father would do to a physician, that killed his children because they distasted or spit out his medicines. It is usually a pitiful defence of truth that is made by the enemies of godliness.
_More near and particular Directions against Error._
_Direct._ I. Begin at the greatest, most evident, certain, and necessary truths, and so proceed orderly to the knowledge of the less, by the help of these:[124] as you climb by the body of the tree unto the branches. If you begin at those truths, which spring out of greater common truths, and know not the premises, while you plead for the conclusion, you abuse your reason, and lose the truth and your labour both: for there is no way to the branches but by ascending from the stock. The principles well laid, must be your help to all your following knowledge.
_Direct._ II. The two first things which you are to learn are, what man is, and what God is: the nature and relation of the two parties, is the first thing to be known in order to the knowledge of the covenant itself, and all following transactions between God and man.[125] One error here will introduce abundance. A thousand other points of natural philosophy you may safely be ignorant of; but if you know not what man is, what reason is, what natural free-will is, and what the inferior sensitive faculties are, as to their uses, it will lay you open to innumerable errors. In the nature of man, you must see the foundation of his relations unto God: and if you know not those great relations, the duties of which must take up all our lives, you may easily foresee the consequents of such ignorance or error. So if you know not what God is, and what his relations to us are, so far as is necessary to our living in the duties of those relations, the consequents of your ignorance will be sad. If learned men be but perverted in their apprehensions of some one attribute of God, (as those that think his goodness is nothing but his benignity, or proneness to do good, or that he is a necessary agent, doing good _ad ultimum posse_, &c.) what abundance of horrid and impious consequents will follow!