There are certain conversations you never forget, the kind that find their way back to you years later, often when you least expect them. Sometimes they’re triggered by a familiar song on the radio. Other times, it’s a passing memory.

For many leaders , those conversations began with a grandfather. They happened around a dinner table, on a fishing boat or while working side by side in a garage. The advice was not delivered as a leadership seminar. It came through stories about the choices that define a person’s character.

While leadership development programs play an important role in preparing today’s leaders, some of the most influential lessons come from men who never held a formal title as mentor. Their wisdom was earned through experience.

That kind of human-centered leadership is essential. A 2024 Harvard Business Publishing leadership development report found that employees increasingly want organizations to see and care about them as people, not just workers.

Papa Joe Robinson was one of a kind. His humor lit up rooms, but what I remember most is how he made everyone feel important.

We shared what he called our “dates,” driving past the places where he grew up before stopping at the local beachfront ice cream parlor. Along the way, he told me stories from World War II and his time with Merrill’s Marauders, the elite unit that helped shape what we now know as the U.S. Army Rangers.

Whenever I had a bad day, he would say, “The difference between a good haircut and a bad one is two weeks.” In other words, this too shall pass. That advice still grounds me. When something feels overwhelming, I ask myself: Will this matter a week from now? Two weeks from now?

There is not a day that goes by when I do not think of my number one buddy and the joy he brought into my life. My fond memories made me wonder about other grandfathers, and the quiet lessons they passed down without ever realizing how deeply they would impact their grandchildren.

The leaders I reached out to inherited a blueprint for treating people right, navigating adversity and leading with purpose. While their lessons differed, each reflected a quality that remains essential to leadership today.

Leadership Through Laughter

For Libby Amber Shayo, founder of Libby Amber Shayo Creative LLC, one of her most enduring leadership lessons came from her grandfather, Alan Mann’s, ability to make people laugh . Family shopping trips often turned into comedy routines, complete with public naps on department store couches while everyone else browsed.

What Shayo remembers most, however, wasn't the joke itself. It was how her grandfather used humor to connect people. "He never hesitated to make people smile," she says. After Mann passed away during her senior year of high school, she began to understand the deeper impact of that gift.

"Even in difficult moments, he taught us that laughter can be a form of resilience and leadership," she says. "People look to you not just for answers, but for emotional steadiness."

Today, that lesson shapes the way she approaches her work as a consultant. Whether she's managing a live event or navigating the inevitable pressures of a fast-moving industry, she tries to bring the same balance her grandfather modeled. "I've learned that humor is not a distraction from seriousness, but a way of making it more human," she says.

In a business world that often celebrates authority and expertise, Mann's legacy offers a different reminder. Sometimes leadership isn't about commanding attention. It's about creating a sense of ease. It's about helping people breathe during stressful moments. And sometimes, it's as simple as making someone smile when they need it most.

Leaving People With A Full Tank

For Jill Freeman, founder of IC Partners, one piece of advice from her grandfather has guided her leadership philosophy for decades: "Never let the customer leave the lot without a full tank of gas."

Her grandfather, George Llewellyn Sr., owned a car dealership in Lorain, Ohio, and spent more than half a century building relationships throughout his community. "Over time, I realized it was a philosophy about creating value beyond the transaction," she says. "He understood that loyalty is built through unexpected generosity."

Today, Freeman applies that same mindset in her work helping organizations improve employee benefits communication. Whether she's working with clients, colleagues or mentoring emerging professionals, she often asks herself a simple question: Did this person leave with more than they came with?

"That's the 'full tank' I try to give people," she says.

The lesson was demonstrated every day through the way her grandfather treated others. Freeman remembers watching him interact with customers, employees and complete strangers. He remembered names and asked thoughtful questions.

"Watching him taught me something different," she says. "True success is reflected in how people feel after spending time with you." Employees stayed for decades. Customers returned year after year. Looking back, Freeman believes those relationships were built on a principle many leaders overlook.

"He understood that trust compounds just like money does," she says.

Discipline Creates Freedom

For Francesca Andre, founder of Nocia, one of the most influential leadership examples came from watching her grandfather, Jean Joseph Louis Jean, known as LamiJan, begin each day with unwavering discipline.

"He didn't own a watch or a clock, yet he woke up before 5 a.m. every day," Andre says. "He took a cold shower, got on his bicycle, and rode to work. He did this until his early 80s. Looking back, I realize I was watching someone intentionally take ownership of his day before the world demanded his attention."

That lesson became increasingly relevant as Andre built her businesses. "For years, I confused activity with achievement," she says. "I was constantly 'on,' which had a negative impact on my mental health and self-worth."

Following her grandfather's example changed that. Today, the quiet hours before the rest of the world wakes up provide time to reflect, pray, think and identify priorities before distractions begin competing for her attention.

"Discipline keeps you going," she says. "Progress over perfection keeps you moving."

For leaders navigating uncertainty, that may be one of the most valuable lessons a grandfather can pass down: true freedom comes from building the discipline to create a life and business that align with your values.

As I get older, I realize my grandfather never intended to teach me a leadership lesson when he told me that the difference between a good haircut and a bad one is two weeks. He was simply helping his granddaughter gain perspective. The most important lessons are passed down through ordinary moments that stay with us long after the conversation ends.

A grandfather’s influence can extend far beyond what he ever imagined, shaping future leaders and the people they inspire along the way.