Re: The Fifth Weapon of the Sage?
I think you just need to be "good" natured. Basically, you need to be a good person and not feel evil. Couple reasons why.
1. The whole Naruto V. Kyuubi was Naruto defeating evil and showing that good always triumphs over it.
2. Throughout the whole manga Naruto has been facing evil (bullied, Kyuubi, Gaara, Madara, Sasuke) and using it for good.
3. I think its kind of pointless to say this, but, the manga is Good V. Evil.
4. If this is the truth, then Madara will be about to unlock everything and will be unsuccessful because his heart is filled with hate.