A devastated Luiz took no solace whatsoever from seeing his boyhood idols crowned world champions, having been desperate to add the title to his Champions League triumph.
It was not to be as Chelsea crashed to a 1-0 defeat in Yokohama.
Midfielder Ramires burst into tears straight after the match, and Brazil team-mate Luiz said: "I cried. I wanted to win.
"I dreamt one day of playing in the Club World Cup final.
"I play for a big club and big clubs win big games and big titles.
"You can cry one night. Tomorrow is another day."
Asked if he was pleased for Corinthians as a boyhood fan, Luiz said: "I cannot be happy. I want to win this title. I say congratulations to Corinthians."
The 25-year-old refused to allow the setback to haunt him.
He added: "I have an amazing family. I have a great job and a great life. I just need to say thanks every day.
"It is easy for people to say thanks when you win and forget everything we you lose."
The much-maligned defender played like a man possessed on Sunday.
Luiz said: "Three months ago, two months ago, other people spoke bad about David Luiz, and tried to kill me but I have confidence in my life.
"Some people like you, some don't. What I want to do is put my head on the pillow and say I worked hard, did my best and I can sleep."
There was bitter disappointment all round from Chelsea's players.
Frank Lampard returned to captain the side in his first start for almost two months following injury and had been been hoping to lift another major trophy after leading Chelsea to their astonishing Champions League triumph in Munich.
"It was certainly a meaningful competition," he said.
"It's been meaningful from the minute we got here.
"And, as a club, we wanted to win it."
He added: "There were a few echoes of Munich but sadly it didn't end the same.
"The game's about scoring goals at the end of the day.
"We had chances throughout the game. We didn't play at our best.
"The pitch was bobbly but they're a good team and set up well to try to stop you playing great stuff."
Corinthians defender Paulo Andre, who declared victory "a dream come true", claimed he had expected a far tougher game.
He said: "We thought it would be harder and then, when we saw that we were better and playing very well, we said, 'Okay, let's keep doing that and we will be champions of the world'."
On paper, Chelsea boasted a superior squad to Corinthians, but Andre said: "It's not one player, two players but 11 players who work together to achieve their goal and that's what we are doing.
"That's why we are champions of South America and now champions of the world."
He added: "It's a real battle between the third world and the first world.
"For our people, for our fans, who have a difficult life and everything else, it's very important to show the world that we can beat them and that we can be the best in the world just once."
Andre is well known in Brazil for his hobbies outside of football, including writing, painting and playing chess and poker.
He said: "I'm travelling for my vacation right now - tomorrow morning.
"I'm going to the United States, to Las Vegas and Miami. I will have fun!
"I like to play poker.
"Maybe I'm bluffing!"
Andre created a painting after Corinthians' Brazilian title win last year in which his team-mates kicked footballs dipped in black paint at the canvas.
Asked if he would celebrate today's win in a similar way, he said: "I have a painting that I'm preparing.
"Actually, it's 11 paintings.
"You will see..."