• The ancient story of Rabbi Nachum Ish Gamzu reveals a profound truth: mindset, faith, and meaning directly shape the body’s biology (Kaptchuk et al., 2010; Fredrickson et al., 2013).
• Modern functional medicine, neuroscience, and psychoneuroimmunology now confirm that our beliefs influence stress hormones, inflammation, immune function, and cellular repair (Chrousos, 2009; Segerstrom & Miller, 2004).
• Research demonstrates that meaning and positive expectancy can improve digestion, pain, inflammation, immunity, and anxiety (Kaptchuk et al., 2010; Fredrickson et al., 2013).
• “Gam Zu L’Tovah” ("This, too, is for the good") mirrors what modern medicine calls cognitive reappraisal, neuroplasticity, and the meaning response (Lazar et al., 2005).
• A simple shift in our thinking - from fear to faith - has a profound influence on our body.
Have you ever had a moment where something went wrong… so wrong that you thought, “There’s no way anything good can come from this”?
There’s an ancient story that teaches us something remarkable about those moments ...
The Talmud (Taanit 21a) tells a wonderful story about Rabbi Nachum Ish Gamzu, the teacher of Rabbi Akiva, who lived with one unwavering spiritual principle:
“Gam zu l’tovah — this too is for the good.”
Not as denial.
Not as forced optimism.
But as a deep belief that even in difficult times — even in painful moments — something good can still emerge.
Rabbi Nachum was once chosen by his small Jewish community to deliver a chest of jewels to the Roman emperor, Caesar, as a gift of their loyalty — a gesture meant to protect their fragile safety.
Along the journey, unbeknownst to the Rabbi, the innkeeper stole the jewels from the chest and replaced the treasure with dirt.
The next day, the Rabbi arrived in Rome to present his gift to the emperor.
When Caesar opened the chest and found only earth, he became outraged and furious — but Rabbi Nachum whispered only one thing:
“Gam zu l’tovah.”
This too is for the good.
According to the Midrash, at that exact moment, God sent Elijah the Prophet, disguised as a Roman officer, who suggested that this was no ordinary dirt.
He claimed it might be the miraculous dust that God gave to Abraham — dust which, by divine power, turned into swords and arrows in battle.
Caesar tested it…
And the miracle repeated itself.
The Roman army used the dirt in battle and won a decisive victory.
Rabbi Nachum was rewarded with jewels and precious stones, and the Jewish people were honored and protected.
It all began with one spiritual shift:
A moment of faith — a deep belief that even in difficult and painful moments, something good could emerge.
What Rabbi Nachum revealed spiritually, modern medicine now measures physiologically.
Neuroscience, psychoneuroimmunology, and functional medicine all point to the same conclusion: the way we interpret our experiences directly shapes our biology — not metaphorically, but literally.
Harvard researcher Ted Kaptchuk, MD demonstrated this powerfully in his landmark 2010 clinical trial, which showed that even open-label placebos — placebos given honestly, without deception — created real, measurable improvements in symptoms and well-being. (Placebos without Deception: A Randomized Controlled Trial): https://pmc.ncbi.nlm.nih.gov/articles/PMC3008733/
Kaptchuk describes this phenomenon as: “The body’s ability to heal in response to meaning.”
When our story turns fearful or catastrophic:
• The sympathetic nervous system activates
• Cortisol rises
• Inflammation increases
• Healing slows
(Chrousos GP, 2009) https://pubmed.ncbi.nlm.nih.gov/19488073/
But when our story shifts — even slightly — toward trust, hope, compassion, or the belief that something good may still emerge:
•Parasympathetic “rest-and-repair” pathways activate
•Heart rate variability improves
•Inflammatory cytokines fall
•The immune system regains balance
(Fredrickson BL et al., 2013) https://www.pnas.org/doi/full/10.1073/pnas.1305419110
• Neuroplasticity increases (Lazar 2005) https://pubmed.ncbi.nlm.nih.gov/16272874/
Your biology listens to your beliefs.
Your immune system listens to your story.
Your brain rewires around the meaning you assign to your experience.
This is why we say in functional medicine:
In this sense, Gam Zu L’Tovah is not simply a spiritual phrase — it is a neurobiological intervention.
Healing begins the moment you recognize that you have a choice in the story you tell about your experience.
When you pause and say,
“This is hard… and something good may still emerge,” you interrupt the automatic stress response.
Every slow exhale sends a signal of safety to the vagus nerve.
Every gentle reframe quiets inflammation.
Every moment of meaning creates a new neural pathway.
And when you anchor yourself spiritually — with “Gam Zu L’Tovah” ("This, too, is for the good.") or any phrase that reconnects you to possibility — you activate the healing response.
This is where ancient wisdom meets modern biology.
⸻
1. Chrousos GP. Stress and disorders of the stress system. Nat Rev Endocrinol. 2009;5(7):374-381. https://pubmed.ncbi.nlm.nih.gov/19488073/
2. Segerstrom SC, Miller GE. Psychological stress and the human immune system: a meta-analytic study of 30 years of inquiry. Psychol Bull. 2004;130(4):601-630. https://pubmed.ncbi.nlm.nih.gov/15250815/
3.Fredrickson BL et al. A functional genomic perspective on human well-being. PNAS. 2013;110(33):13684-13689. https://www.pnas.org/doi/full/10.1073/pnas.1305419110
4.Kaptchuk TJ et al. Placebos without deception: a randomized controlled trial in irritable bowel syndrome. PLoS One. 2010;5(12):e15591. https://pmc.ncbi.nlm.nih.gov/articles/PMC3008733/
5.Lazar SW et al. Meditation experience is associated with increased cortical thickness. Neuroreport. 2005;16(17):1893-1897. https://pubmed.ncbi.nlm.nih.gov/16272874/
6.Koenig HG. Religion, spirituality, and health: the research and clinical implications. ISRN Psychiatry. 2012;2012:278730. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3671693/
Neil F. Neimark, M.D., is a board-certified family physician and founder of mdPersonal Concierge Functional Medicine in Irvine, California.
His work bridges advanced regenerative medicine with the deeper dimensions of emotional and spiritual healing. Through his books, articles and social media posts, Dr. Neimark helps patients move beyond disease management toward true wholeness of body, mind, and soul.
Do you have questions about starting your path back to health? Our patient coordinator is standing by, happy to answer any questions you have to determine if our approach is right for you.
Do you have questions about starting your path back to health? Our patient coordinator is standing by, happy to answer any questions you have to determine if our approach is right for you.
mdPersonal Concierge Functional Medicine is located in Irvine, CA, and serves patients throughout Irvine and South California. These areas include but are not limited to Tustin, CA, Costa Mesa, CA, Santa Ana, CA Tustin Foothills, CA Orange, CA Newport Beach, CA Fountain Valley, CA Laguna Woods, CA Lake Forest, CA Garden Grove, CA Laguna Hills, CA Aliso Viejo, CA Laguna Beach, CA Huntington Beach, CA Westminster, CA Santa Ana, CA Anaheim, CA Long Beach, CA Riverside, CA, San Clemente, CA, Dana Point, CA, Anaheim, CA, Yorba Linda, CA, and Brea, CA.