It wasn't what was said; it was how it was relayed.

Didn't matter. It was enough to get LeBron James' attention, and enough to eventually doom Shawn Marion and the Dallas Mavericks.

With James making a season-high 42-point statement, the Miami Heat emerged from the All-Star break with a 117-106 victory Tuesday night at American Airlines Center.

James, who shot 16 of 23 and added nine rebounds, sparked the Heat with a personal 8-0 run early in the fourth quarter, after Dallas' rebounding dominance appeared as if it was going to be too much to overcome.

Through it all, the Heat found a way to overcome the Mavericks' 50-28 rebound margin, with backup center Chris Andersen as frenetic as James was energetic, adding 18 points, including a late 3-pointer that had James celebrating as wildly as after any of his baskets.

"I'm feeling really good right now, really good," James said when it was over, as much about the energy level he mustered through his 38 minutes Tuesday, as the overall result. "I'm in a zone right now."

Factor in 22 points from center Chris Bosh and 13 from guard Dwyane Wade and the Heat won going away.

But it was James, and his relentlessness, that made the difference, outscoring the Mavericks 12-11 over the game's final 7 minutes, 30 seconds.

"He's got talent, motor, skill and dedication," Heat coach Erik Spoelstra said. "He only knows one way.

"He's hyperactive."

It was James' 50th career 40-point game, joining Kobe Bryant (120) as the only players with at least 50 such performances. He joined Bryant and Allen Iverson as the only players to reach 50 40-point games before their 30th birthdays. He now has scored 35 or more in three straight games for the first time since joining the Heat in the 2010 offseason.

The day started when Marion, the former Heat forward, was asked about the recent debate over James saying he one day could envision himself on an NBA Mount Rushmore.