(45) Further, that we may not confound precepts which are eternal with those which served only a temporary purpose, or were only meant for a few, we should know what was the occasion, the time, the age, in which each book was written, and to what nation it was addressed.(46) Lastly, we should have knowledge on the other points I have mentioned, in order to be sure, in addition to the authenticity of the work, that it has not been tampered with by sacrilegious hands, or whether errors can have crept in, and, if so, whether they have been corrected by men sufficiently skilled and worthy of credence. (47) All these things should be known, that we may not be led away by blind impulse to accept whatever is thrust on our notice, instead of only that which is sure and indisputable. (48) Now when we are in possession of this history of Scripture, and have finally decided that we assert nothing as prophetic doctrine which does not directly follow from such history, or which is not clearly deducible from it, then, I say, it will be time to gird ourselves for the task of investigating the mind of the prophets and of the Holy Spirit. (49) But in this further arguing, also, we shall require a method very like that employed in interpreting nature from her history. (50) As in the examination of natural phenomena we try first to investigate what is most universal and common to all nature - such, for instance, as motion and rest, and their laws and rules, which nature always observes, and through which she continually works - and then we proceed to what is less universal; so, too, in the history of Scripture, we seek first for that which is most universal, and serves for the basis and foundation of all Scripture, a doctrine, in fact, that is commended by all the prophets as eternal and most profitable to all men. (51) For example, that God is one, and that He is omnipotent, that He alone should be worshipped, that He has a care for all men, and that He especially loves those who adore Him and love their neighbour as themselves, &c. (52) These and similar doctrines, I repeat, Scripture everywhere so clearly and expressly teaches, that no one was ever in doubt of its meaning concerning them. (53) The nature of God, His manner of regarding and providing for things, and similar doctrines, Scripture nowhere teaches professedly, and as eternal doctrine; on the contrary, we have shown that the prophets themselves did not agree on the subject; therefore, we must not lay down any doctrine as Scriptural on such subjects, though it may appear perfectly clear on rational grounds.