Now in this Training of the Child there is one most dear Consideration, that I shall impress upon thee as in Conformity with our Holy Experience in the Way of Truth. And it is this, that since that which can be thought is not true, every Statement is in some Sense false. Even on the Sea of pure Reason, we may say that every Statement is in some Sense disputable, there fore in every Case, even the simplest, the Child should be taught not only the Thesis, but also its opposite, leaving the Decision to the Child's own Judgment and good Sense, fortified by Experience. And this Practice will develop its Power of Thought, and its Confidence in itself, and its Interest in all Knowledge. But most of all beware against any Attempt to bias its Mind on any point that lieth without the Square of ascertained and undisputed Fact. Remember also, even when thou art most sure, that so were they sure who gave instruction to the young Copernicus. Pay Reverence also to the Unknown unto whom thou presumeth to impart the Knowledge; for he may be one greater than thou.
 On the Method of Argument