Basically, Manny Pacquiao is down to two options: (1) health or (2) redemption.
He should give it a lot of thought and weigh his options before making a decision, so he won't regret it in the future.
The way I see it, Manny is bound for the Hall of Fame whether he continues fighting or not. With career-defining wins against names like Miguel Cotto, Ricky Hatton, Marco Antonio Barrera, Erik Morales, and Oscar Dela Hoya in his resume, his legacy is solid and cannot be taken away from him.
Now, if he decides to continue fighting and gets knocked out again, he will forever regret that decision. Blows to the head have a lasting effect. Note that concussions "are more than just pain. Recent research on the pathology of brains, conducted by the Boston University Center, suggests that over time a high level of exposure to intense physical contact can cause permanent brain damage
. Potential risks include chronic traumatic encephalopathy (CTE), which can cause depression and suicide in older athletes
" (http://sportsillustrated.cnn.com/2012/f ... index.html
Boxing is not good for a part-time boxer like Manny Pacquiao, and his last fight against Juan Manuel Marquez is solid proof of that. And I don't see Manny quitting politics, show business, evangelism, etc., anytime soon.
So if Manny wants to have a life free from the ill-effects of boxing, he should retire now while he is relatively healthy. Spend time with his lovely wife and adorable children. Preach the message of God to the masses. Make laws. He cannot do this if he is invalid.
For any top athlete, the desire to avenge a loss, especially a humiliating one, is always there. This is perfectly understandable.
Now, if Manny really wants to redeem his name as boxing's top fighter, he should
1. drop everything else (acting, singing, preaching, etc.) and concentrate on boxing,
2. listen to his trainer and conditioning coaches,
3. train early,
4. keep distractions to a minimum.