_Direct._ XIII. Take nothing as universally necessary in religion, which was not so taken in the days of the apostles, and primitive church; and take that for the safest way to heaven which the apostles went who certainly are there: value the apostolical purity, simplicity, charity, and unity; and follow not them that by being wise and pious overmuch, corrupt our sacred pattern by their additions, and fill the church with uncharitableness and strife.
If it were not a thing too evident that dominion and riches go for religion with them, and gain for godliness, and honour and money instead of argument, it would be a most stupendous wonder that so many learned men should be found among christians in the world, to hinder the peace and unity of the church, as do it vehemently and implacably in the church of Rome; when so easy a thing, and so reasonable, would unite almost all the christian world, as is the requiring no more as necessary to our union, than what was made necessary in the days of the apostles, and the obtruding nothing as necessary to salvation, which the apostles and primitive church were saved without. This easy, reasonable thing, which no man hath any thing of seeming sense and weight to speak against, would end all the ruinating differences among christians.
_Direct._ XIV. Be desirous to know all that God would have you know, and be willing to be ignorant of all that God would have you ignorant of; and pry not into unrevealed things; and much less make them the matter of any uncharitable strife.
Abundance of contentious volumes between the Dominicans, and Jesuits, and many others, are stuffed with bold inquiries, wranglings, or determinations of unsearchable mysteries, utterly unknown to those that voluminously debate them, and never revealed in the word or works of God. Keep off with reverence from concealed mysteries. Talk not as boldly of the divine influx, and the priority, posteriority, dependence or reason of God's decrees, as if you were talking of your common affairs. Come with great reverence when you are called of God to search into those high and holy truths, which he hath revealed. But pretend not to know that which is not to be known. For you will but discover your ignorance and arrogance, and know never the more, when you have doted about questions never so long.
_Direct._ XV. Avoid both extremes, of them that study no more but to know what others have written and held before them, and of them that little regarded the discoveries of others. Learn all of your teachers and authors that they can teach you; but make all your own, and see things in their proper evidence; and improve their discoveries by the utmost of your diligence; abhorring a proud desire of singularity, or to seem wiser than you are.