Thomas Ellis was a quiet man who believed that most things could be understood if you were willing to take them apart carefully enough.
He spent thirty years repairing refrigeration systems in grocery stores, hospitals, restaurants, and commercial buildings.
His work wasn't glamorous.
When a supermarket freezer stopped operating in July, somebody needed to repair it before thousands of dollars of food spoiled.
When a hospital's specialized refrigeration unit developed a problem, the consequences could be more serious.
Thomas understood the importance of reliable equipment.
He also understood that technology was only useful when it served somebody's needs.
When Naomi entered high school, he began teaching her how to diagnose problems rather than simply replace parts.
One Saturday morning, he placed a malfunctioning thermostat on the kitchen table.
"Tell me what's wrong with it."
Naomi stared.
"I don't know."
He smiled.
"Good."
She frowned.
"Good?"
"Means we're starting in the right place."
He handed her a small screwdriver.
"Now let's find out."
They spent two hours examining the device.
Thomas explained the electrical connections, the sensing mechanism, and the way small failures could disrupt an entire system.
Naomi became fascinated.
Not with thermostats specifically.
With the possibility of understanding how complicated things worked.
By sixteen, she had developed an interest in engineering.
By seventeen, she was building simple software tools to organize her father's service appointments.
By eighteen, she had earned a scholarship to study industrial engineering.
Her mother cried when the acceptance letter arrived.
Her father read it twice.
Then folded it carefully and placed it in the drawer where he kept important family documents.
Naomi laughed.
"Dad, you know you can print another copy."
Thomas smiled.
"I know."
"Then why are you saving that one?"
He looked toward her.
"Because this is the one you opened."
That was the kind of man he was.
He paid attention to moments other people might overlook.
When Naomi left for college, he gave her his old wristwatch.
The metal band was scratched.
The glass carried a small mark near the edge.
And the watch had stopped working several times over the years.
But Thomas had repaired it himself.
He placed it in her hand.