"What did I think about every day? I thought about my children. I thought about my family. Of course, I thought about my career and I'm happy to be home.
"Anybody should know, your freedom is extremely important. There's nothing more important than freedom. Once you lose your freedom, you understand that."
Guerrero, the challenger and the underdog, has said that he wants to "humble" Mayweather in front of God and explained how age might be finally catching up to one of the sport's true greats. Guerrero said he was motivated to defeat boxing's biggest draw "because of the way that he acts, the way that he lives, the way that he spends money and the way that he boasts about stuff".
"He's got everybody thinking that he's unstoppable and that nobody can beat him. Floyd believes that there is no blueprint to beat him. Being a big believer in God, there's a blueprint for everybody."
Southpaw Guerrero's build-up for the fight was marred by his arrest last month for trying to take an unregistered firearm through JFK Airport in New York.
In a professional career spanning 43 bouts over more than 16 years, Mayweather has defeated all comers. But he seems more in control of his mindset, and his life, than ever before.
"He [Guerrero] is a young, tough competitor," said Mayweather. "He talks a good game so now we'll just have to see if he can fight the same way he talk."