The Selecao captain was missing through suspension in Belo Horizonte on Tuesday as his side were thrashed 7-1 at by Germany.
"It's almost impossible to explain what happened," he told the Brazilian FA (CBF)'s website.
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A desperate first-half performance saw Brazil go into the break 5-0 down and things barely improved after the interval as Germany cruised into an eighth World Cup final.
Home fans, so fervent in their support of the national team throughout the tournament, were stunned into silence and even began to applaud Joachim Low's side after Andre Schurrle netted the seventh goal.
Thiago Silva, who had watched on from the stands, took to the field after the final whistle to console his team-mates, with stand-in skipper David Luiz particularly upset.
"The pain from this defeat is too big. It is during this bad time that we need the strength of the fans even more," he added.
"I guarantee that we will play Saturday's game like it was the final of the World Cup."