He was 12 years old, standing in line at the circus ticket counter with his father, watching a man with eight children realize he didn’t have enough money. The father’s wife let go of his hand. His lip started to quiver. Clark’s dad reached into his pocket, pulled out a $20 bill, dropped it on the cement, bent down, picked it up, and tapped the stranger on the shoulder. “Excuse me, sir, this fell out of your pocket.”

The Clarks didn’t go to the circus that night. But decades later, when his father passed away after a six and-a-half-year battle with cancer, a woman called. She’d seen the obituary photo and recognized his face. Years earlier, S. Wayne Clark had paid for her groceries when she was a broke single mother, then left an extra $100 and disappeared before she could thank him. She’d spent years trying to find him.

“That wasn’t just a one-off,” Clark says. “That’s who he really was.”

This quiet greatness is what Clark explores in the upcoming documentary “Pillars of Power: The Hidden Secret Behind Achieving Greatness,” alongside thought leaders like Jack Canfield, Dr. Joe Vitale, Dr. John Demartini, Jerry Sargeant and John Assaraf. The film examines five foundational pillars (Money, Relationships, Health, Mental Wellness, and Spirituality), and for Clark, they all point back to the same lesson his father taught him: true significance lives in service without seeking credit.