On that late afternoon, as light thinned to amber, Goldratt traced a line through a page of The Goal and smiled at an old margin note: “Don’t let tools substitute for thinking.” He believed that the best artifacts—books, PDFs, models—served one purpose above all: to turn bewilderment into insight, and insight into action. Quality, in the end, was a byproduct of that chain: clear goal, honest measurement, disciplined constraint management, and people engaged in continual learning.