Jimmy Butler will keep telling his mind and "nicked up" body to "cut it out" and go through the pain barrier as the Miami Heat strive for NBA glory.

Butler scored 40 points, provided 13 assists and grabbed 11 rebounds to inspire the Heat to a 115-104 NBA Finals Game 3 victory over the Los Angeles Lakers on Sunday.

The Heat will attempt to maintain the momentum and level the seven-match series at Walt Disney World in Florida on Tuesday.

Five-time All-Star Butler has played almost every minute of the last two games and was fouled 11 times in his magnificent performance last time out.

Butler knows his body will come in for more punishment but is ready to suffer with so much at stake.

Asked how he goes about getting ready for Game 4, he said: "A lot of rest, a lot of treatment, a lot of everything. But I think a lot of it's mental.

"You know your body is going to be hurt, but you've got to tell your mind and tell your body to cut it out. And I think that's where I'm at at this point.

"Everybody is hurting, not just me. Everybody on my roster, everybody on the Lakers' roster. We're all nicked up. We've all got some pain. But we're all coming out there to compete."

Butler hopes his exploits have made basketball fans realise his burning desire to be successful.

Asked what he thinks NBA fans may have learned about him, he replied: "For me, that I'm just all about winning. I'll do whatever you ask me to do, if you can guarantee me a win. I realise that nothing is guaranteed.

"But I'll do whatever you ask me to do to put my team in the best position to win. That's it."