The French trainer says that while the iconic No.10 is not a rousing character in the dressing room, his mere presence on the field lifts all those around him
The 2006 World Cup winner has been out of action since suffering a hamstring injury against Napoli in October but he is now approaching full fitness once again.
Garcia concedes that Roma, who have drawn their last four games, have missed the inspirational presence of their talismanic No.10 in recent weeks.
"I can say that Totti is a simple man, humble," the ex-Lille coach told reporters on Wednesday.
"He's never skipped training, he's never asked for special treatment even though he's 36. He's the kind of guy that loves football, that is always available.
"Maybe he's not a leader in the dressing room. He's not one of those that shouts to motivate the troops but he is appreciated by his team-mates because he's an intelligent guy.
"And then he's an example on the field. Having seen him, I said that he's not only a great player, but he's simply one of the greatest players in the history of football."
The Giallorossi, of course, had opened their campaign with 10 successive wins but have now fallen three points behind champions Juventus.
While they remain unbeaten, Garcia accepts that Roma simply do not have the squad to compete for the title.
"We are not on the level of Juve and Napoli, who have been constructed to fight for the Scudetto and go far in Europe," he reasoned.
"I'm not saying that we cannot win the title, but right now, we have not been set up to."
Roma will be hoping to get back to winning ways when they host Fiorentina at the Stadio Olimpico on Sunday.