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Before Goggins, There Was Ehret: Mastering Endurance Through Clean Living & Grit

Posted on September 14, 2025September 14, 2025 by Prof. Spira

Most people know David Goggins as the definition of grit and limitless endurance. But long before him, Arnold Ehret shattered the boundaries of human capability—without stimulants, protein, or drugs. He relied solely on a disease-free diet, fasting, and sheer, unwavering mental focus. The Healing Foundation: More Than Endurance Prof. Arnold Ehret, after curing himself of […]

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Blog, detox, Holistic Healing, Mindset & Discipline, Physical Culture

Before Goggins, There Was Ehret: Mastering Endurance Through Clean Living & Grit

Thank you for blessing me! Your recipes are incredible and have given me a new purpose. I'm LOVING it! You truly are amazing. You have done nothing but given all you can to help me and I truly appreciate this. Thank you for feeding me.

Your personal rediscovery of your radiant, intended self is amazing! Living examples, that’s what people you are like, timeless individuals who live natural truth and telebeam it to others. . .

The book is excellent! I love the fact that you are so detail oriented. With each page I was learning a lot. Professor Spira, you really outdid yourself and deserve a pat on the back!

The people just finding out about the Mucusless Diet Healing System NEED this – people like me… even after years on a raw transition we need to know it’s OK to transition any way that we can.

Spira’s annotated notes and the supplemental materials he provides are so helpful! His humor and easy-to-understand explanations make me feel like I’m actually sitting in his classroom! I love that I can easily stop and start the eCourse as my schedule allows.

Love the course Prof. Spira! I just got to the recipe and cooking. It’s so well put together and informative.I’m finding the course so helpful. I studied the system for a long time and with the course combined, it puts all the missing pieces together.

Prof. Spira’s writings and teachings have helped enhance my life in many ways. One, I really like that he is very in-depth, and he does a lot of the side notes in the books so that you can understand what’s going on better....

The monumental work of Arnold Ehret was masterfully written, and Spira’s updates are the natural continuation of it for the decades to come. All mankind should benefit from this valuable information. In a word, if I were on a desert island, this is the only book that I would take with me.