Board Thread:Naruto News/@comment-25648694-20141109075459/@comment-3568954-20141110065733

Elveonora wrote: Correction, having Rinnegan doesn't mean you can automatically use all natures. The eyes just make it easier to figure out how to do them. There's no evidence Sasuke can use all natures because of the Rinnegan, he has had it just for 1 day or so.

Remember, he is a prodigy/genius whatever and an incarnate of Indra, student of Sannin Orochimaru and so on. Also the Sharingan can copy and analyze techniques, so with enough intelligence and talent, it stands to reason that Sasuke learned how to use the natures through observation with his Sharingan imo.

well i wouldn't really call him a prodigy i would say he is a genius but not really a prodigy. so far only few shinobi have been said to be prodigy and that was orochimaru, minato, and itachi. if i am correct, also what my understanding is that the real reason a Rinnegan user can easily master all 5 elements is the fact they can absorb chakra since they can absorb it. they can easily learn the proper frequency of chakra natures but i could be wrong