If two masters of the same art differ in their statement of it, in all likelihood the insoluble problem lies midway between them.
The orbits of certainties touch one another; but in the interstices there is room enough for error to go forth and prevail.
We more readily confess to errors, mistakes, and shortcomings in our conduct than in our thought.
And the reason of it is that the conscience is humble and even takes a pleasure in being ashamed. But the intellect is proud, and if forced to recant is driven to despair.
This also explains how it is that truths which have been recognised are at first tacitly admitted, and then gradually spread, so that the very thing which was obstinately denied appears at last as something quite natural.