_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! _Direct._ III. Having soundly understood both these and other principles of religion, try all the subsequent truths hereby, and receive nothing as truth that is certainly inconsistent with any of these principles.[126] Even principles that are not of sense, may be disputed till they are well received; and with those that have not received them: but afterwards they are not to be called in question; for then you would never proceed nor build higher, if you will stand questioning all your grounds. Indeed no truth is inconsistent with any other truth: but yet when two dark or doubtful points are compared together, it is hard to know which of them to reject. But here it is easy; nothing that contradicteth the true nature of God or man, or any principle, must be held. _Direct._ IV. Believe nothing which certainly contradicteth the end of all religion. If it be of a natural or necessary tendency to ungodliness, against the love of God, or against a holy and heavenly mind and conversation, it cannot be truth, whatever it pretend.