The reader has had most of this system now presented to him. His work in following these difficult abstruse thoughts has not been easy. Now he may face, if he wishes, an entirely fresh task, that of bringing ultimate truth down from theory to practice. It has to be made real to himself. It has to be fully and finally realized. Constant recollection and constant practice are the only way to do this. When he comes to this final frontier of all existence, he must bow his head in humble homage to the fact that here neither yoga nor religion can venture across alone. Here the man alone may pass who can live utterly and fully what he has thought in metaphysics, what he has felt in religion, and what he has experienced in the tense stillness of yoga.
-- Notebooks Category 20: What Is Philosophy? > Chapter 4 : Its Realization Beyond Ecstasy > # 301
