SAN ANTONIO — There was nothing left to psychoanalyze late Thursday, no expressions to interpret, no gestures to dissect, no bewildering play to scrutinize. There was only the Miami Heat, the true version, the audacious, dominating, swaggering version, the ones with no self-doubt or indecisiveness.

LeBron James reclaimed his form and Dwyane Wade reasserted his will over his own battered body, leading the Heat to a 109-93 rout of the San Antonio Spurs, tying the NBA Finals at 2-2 and guaranteeing that the series would return to Miami. They will play one more game here Sunday.

James had 33 points and 11 rebounds, looking more like the James of 2012, his aggression never in question. Wade had 32 points, six rebounds, four assists and six steals, looking like the Wade of 2006, his sore right knee an afterthought.

The Heat led for the entire fourth quarter, putting the game away with a series of baskets by Wade and Chris Bosh, who also turned in a throwback performance, with 20 points, 13 rebounds and two blocks.

At long last, the Heat’s Big Three looked big again. James attacked, Wade soared and Bosh stood tall, swatting layups and closing the lane. Miami’s defense was revived, its offense pulsing again. It was Wade’s first 30-point game since March 4, a span of 102 days and 33 games.

“All of them provided us great energy defensively, and that got us off to a decent start,” Heat coach Erik Spoelstra said. “This happened to be a game where they were all able to be aggressive.”

The Spurs got solid production all around — 20 points from Tim Duncan, 15 from Tony Parker and six more 3-pointers from Danny Green and Gary Neal — but no singular transcendent performance to match the Heat’s dynamism.

Through three games, the Heat’s three stars had scored 130 points — the same total as the Spurs’ Kawhi Leonard, Neal and Green. This was surely the most humiliating statistic of the series.

After 48 hours of public confessions and self-floggings, James vowed before tipoff to be more assertive and smartly so.

“It’s a difference between being aggressive and being out of control,” he said. “I think I know the difference.”

That much, no one has ever doubted, even if fans fairly wondered about the settings on his aggression meter.

“He was just able to be aggressive,” Spoelstra said. “They don’t make it easy. There’s going to be people in the paint. He was able to make the right reads.”

There was no ambiguity on this night. James attacked from the opening tip, took Leonard into the post and looked lively wherever he roamed. He had 15 points by halftime, matching his Game 3 total, with a crisp 7-for-11 shooting line. Just as encouraging for the Heat: Wade had 14 points in the half, his sore knee appearing sound once more.

“When Bosh, Wade and James score the way they did tonight, shoot it the way they did tonight, a team is going to have a difficult time,” Spurs coach Gregg Popovich said.

Each team built, and blew, a 10-point lead in the first half, which ended 49-49. The Spurs closed the half on an 18-8 run, with a surprising seven-point burst from reserve Boris Diaw and a spectacular circus shot from Parker, who converted a driving bank shot while falling down.

Any concerns about Parker’s strained right hamstring quickly dissipated. He drove hard, slashed past defenders with ease and showed zero hesitation, scoring a team-high 15 points in the half, on 7-for-12 shooting.

After getting routed by 36 points in Game 3, Spoelstra bemoaned his team’s poor defense. But his first strategic move in Game 4 was designed to spark the offense.

Spoelstra shook up his lineup, replacing Udonis Haslem with Mike Miller, trading size and brawn for shooting and floor spacing. It did open up the offense — for the Spurs.

Popovich soon downsized his lineup to match, inserting Neal for Tiago Splitter, and within minutes, the Spurs had a 15-5 lead, fueled by 3-pointers from Neal, Green and Leonard.

Then, as if on cue, James exploded. A fast-break layup. A driving jumper. A 20-footer. A 17-footer. James scored eight points in a 14-2 run, and the Heat took a 29-26 lead by the end of the quarter.

This was the LeBron everyone wanted, the one the Heat needed, the one who could dominate and inspire and save a series. All he needed was a little help from his superfriends.