That quote has lost its meaning, today i think he lost his motivation to fight. Back then he was fighting for something. Today he can retire and have enough money to last him 4 life times.
I really don't think its motivation, becoz we all saw how he goes crazy to finish the fights from the start but got caught. I think its:
1- Terrible management from his managers,
2- No Mental preparations for a lose, or for approaching a fight after a lost that came after a decade.