3. The _infallible_ sign of _teaching exactly_, and without error, is this, that _no man_ hath _ever taught_ the _contrary_: not that few, how few soever, if any; for commonly truth is on the side of a few, rather than of the multitude: but when in opinions and questions considered and discussed by many, it happeneth that not any one of the men that so discussed them differ from another, then it may be justly inferred, they know what they teach, and that otherwise they do not. And this appears most manifestly to them that have considered the divers subjects wherein they have exercised their pens, and the divers ways in which they have proceeded, together with the diversity of the success thereof: for, those men who have taken in hand to consider nothing else but the comparison of _magnitudes_, _numbers_, _times_, and _motions_, and how their proportions are to one another, have thereby been the authors of all those excellencies by which we differ from such savage people as now inhabit divers places in America; and as have been the inhabitants heretofore of those countries where at this day arts and sciences do most flourish: for, from the studies of these men, have proceeded whatsoever cometh to us for ornament by _navigation_, and whatsover we have beneficial to human society by the _division_, _distinction_, and _portraiting the face of the earth_; whatsoever also we have by the _account of times_, and _foresight of the course of heaven_; whatsoever by _measuring distances_, _planes_, and _solids_ of all sorts; and whatsoever either _elegant_ or _defensible_ in _building_: all which supposed away, what do we differ from the wildest of the Indians? Yet to this day was it never heard of, that there was any _controversy_ concerning any conclusion in this subject; the science whereof hath nevertheless been continually amplified and enriched by the conclusions of most difficult and profound speculation. The _reason_ whereof is apparent to every man that looketh into their writings; for they proceed from most _low_ and _humble_ principles, evident even to the meanest capacity; going on _slowly_, and with most _scrupulous ratiocination_; viz. from the imposition of names, they infer the truth of their _first_ propositions; and from two of the first, a _third_; and from any two of the three, a _fourth_; and so on, according to the steps of science, mentioned chapter VI. section 4. On the other side, those men who have written concerning the faculties, passions, and manners of men, that is to say, of _moral philosophy_, and of _policy_, _government_, and _laws_, whereof there be infinite volumes, have been so _far from removing doubt_ and controversy in the questions they have handled, _that_ they have very much _multiplied the same_: _nor_ doth any man at this day so much as pretend to _know_ more than hath been delivered two thousand years ago by Aristotle: and yet every man thinks that in this subject he