LeBron James didn’t have a speech prepared.

“I’m just speaking to y’all from the heart,” the NBA’s all-time leading scorer told the audience Thursday night at the Time 100 Sports gala in New York.

In James’ heart and on his mind at that moment was his oldest son, Bronny James, who nearly three years ago suffered sudden cardiac arrest as an 18-year-old rising freshman while practicing with the USC basketball team. He later was diagnosed with a congenital heart defect but eventually was able to resume his basketball career.

James and his son ended up Lakers teammates for two seasons before the 23-year veteran became a free agent this summer. Bronny James is entering his third season with the Lakers after his contract became fully guaranteed earlier this month.

“Obviously, if it wasn’t for the coaching staff and the medical team and everybody at USC being there in a timely fashion, we’d possibly be sitting here without our oldest son,” said James “So thank you to everybody and all the efforts when it comes to cardiac arrest.”

In June, Time magazine released its inaugural issue highlighting the 100 most influential people in sports, with James on the cover as “athlete of the century.”

James was one of the featured speakers at the gala honoring those individuals, as were fellow Time 100 Sports list members New York Knicks star Jalen Brunson, Olympic gold medalist skater Alysa Liu, Invictus Games founder Prince Harry and women’s soccer legend Alex Morgan.

(Jemal Countess / Getty Images for TIME)

Earlier in the evening, Buffalo Bills safety Damar Hamlin and Angel City FC defender Savy King gave a presentation on their experiences as athletes who suffered cardiac arrest while playing in games for their respective teams.

Like Bronny James, they were both young athletes at the time of their incidents — Hamlin was 24; King was 20 — and both were fortunate to have trained medical staff members on hand to perform CPR and use defibrillators to save their lives.

Their message hit home for James.

“Guys, take that serious,” he said. “If you got kids in elementary, you got kids in middle school, kids in high school, colleges. Make sure they have these devices available where you can get them, practice them. It’s very important, super, super important. Obviously, we know how important it is to our family, so we’re a big advocate of that.”