When the man with the golden beard came home in the evening, he asked immediately, ”What happened to the fountain?”

This statement proves that it is possible for a knower to find out without any laborious consideration or complicated analysis if and when true knowledge has become effective; because this shows up in general progress - not just in the variation of a single detail.

Accordingly the comprehensive effect of pure knowledge must be perfectly obvious for a true knower - no matter how small the contact with pure truth is, just like one knows the effect of the fire from its heat or its ashes.