Theory Criticism Wisdom
The key word in the quote is “proving.”
A priori knowledge may boast theory, while proof requires synthesis of a posterior knowledge —a "been there, done that" appreciation of the concept basin as a paradigm, where theoretical is registered or calibrated by the actual. This converts theory to applied science.
Replacement therapy for those introspective moments when the mirror neurons are stuck in outcast mode: Focus on creating proof.
Replacement therapy two: escape to the man cave and smile alot.