The Mystique of Enlightenment: Enriched edition. Challenging Traditional Notions: A Radical Perspective on Enlightenment and Existence

by U.G. Krishnamurti

Reaction is thinking about it: 'Right,' 'Wrong.' 'Good,' 'Evil'. Response is just looking without the intervention of thought. Response is physical; reaction is mental. You are all the time reacting; you are not physically responding to the things out there.