In the eighth and final section of the IN8 THOTS journey through Dr. B.J. Palmer's The Science of Chiropractic, Dr. Joe Sheppard brings the entire series together with a question that every generation of chiropractors must answer:

How do we preserve chiropractic's foundational principles while continuing to advance the profession?

This episode reflects on the major concepts explored throughout the series—from the Major Premise, Universal Intelligence, and Innate Intelligence to vertebral subluxation, tone, adaptation, and the specific chiropractic adjustment—and considers what these ideas mean for chiropractic today.

At the center of the discussion is an important distinction: preserving the Principle does not mean preserving the past unchanged.

Dr. B.J. Palmer himself continually questioned, experimented, observed, and refined his ideas. Dr. Joe challenges today's chiropractors to carry forward that same spirit of curiosity by studying the Green Books while also engaging with contemporary anatomy, physiology, neuroscience, biomechanics, pain science, and research.

The episode explores how philosophy and science can complement rather than oppose one another. Philosophy helps us formulate meaningful questions; science gives us methods for investigating them. Respecting chiropractic's history should never require us to fear questions, and embracing modern research does not require abandoning the principles that gave the profession its identity.

A major focus is Dr. B.J. Palmer's lifelong emphasis on the nervous system and the pursuit of specificity. Dr. Joe examines how Dr. B.J.'s later upper cervical work and the development of Hole-In-One (HIO) helped influence generations of specific upper cervical approaches.

One question captures this philosophy particularly well:

That question represents more than technique. It represents observation, patience, restraint, and respect for the patient's ability to respond and adapt.

Sometimes the appropriate clinical decision is to adjust.

Sometimes it is to observe.

And sometimes the greatest demonstration of specificity is knowing when not to adjust.

The episode also addresses one of the most important principles carried throughout the series:

The human body possesses extraordinary biological capacities for regulation, repair, and adaptation. Chiropractic can influence musculoskeletal and neurological function, but respect for the body's self-regulating ability should be accompanied by humility, appropriate clinical boundaries, and claims supported by evidence.

Dr. Joe also explores the meaning of Above-Down, Inside-Out (ADIO) as more than a chiropractic slogan. It represents an appreciation of the human being as an integrated living organism—continually processing information, responding to the environment, and adapting from within.

Finally, the episode speaks directly to the next generation of chiropractors and chiropractic students.

Don't simply memorize chiropractic philosophy.

Understand it.

Know its history.

Read the original Green Books.

Study modern science.

Listen to opposing viewpoints.

Ask difficult questions.

And never be afraid to say:

“I don't know yet.”

Because great chiropractors are never finished learning.

• Preserving chiropractic principles without becoming trapped in the past
• Dr. B.J. Palmer's willingness to question and refine his own ideas
• The relationship between science, art, and philosophy
• Why chiropractic should never be afraid of scientific questions
• The nervous system as a central theme throughout B.J.'s work
• Modern neuroscience and the importance of distinguishing evidence from historical claims
• Dr. B.J. Palmer's pursuit of specificity
• The influence of HIO and upper cervical chiropractic
• The importance of asking “Did the adjustment hold?”
• Knowing when to adjust—and when not to
• Why the chiropractor is not the healer
• The deeper meaning of Above-Down, Inside-Out
• Reading the Green Books while continuing to study contemporary science
• The responsibility of today's chiropractors to the next generation