Board Thread:Theories and Speculation/@comment-33485854-20180927155618/@comment-30323490-20180927192710

Elveonora wrote: Come on people, let's try to use our brains here:
 * it was said that the incarnates can meet and talk with Hagoromo, granted certain conditions are met
 * the mere virtue of being an incarnate is not the condition, otherwise both Hashirama and Madara would have met and talked to Hagoromo before death, for which there is no evidence
 * therefore, the conditions which allowed Naruto and Sasuke to meet Hagoromo must have been external forces, in Naruto's case, having gotten chakras from all 9 Tailed Beasts, in Sasuke's case, having gotten some Asura chakra from Hashirama's cells
 * If we accept those were things which allowed each to meet Hagoromo, we can also conclude the following:
 * 1) Having received Hashirama's cells, they (Asura's chakra) must have played a part in Sasuke's acquisition of the Rinnegan, as reforming Hagoromo's chakra is the means to get it
 * 2) Having received chakras from all the Tailed Beasts must have played a part in Naruto's acquisition of the Six Paths Senjutsu, as the chakras of all 9 (OR the Ten-Tails' chakra) ARE required for it and I would like people to stop saying that it isn't, since a canonical novel claims it is, rendering your denial useless
 * 3) Therefore, the most logical conclusion is that their specific powers are both a result of the conditions which allowed them to meet Hagoromo in the first place and Hagoromo's interference as well, rather than just either of those, it's both

Exactly. Pretty much reproducing six path chakra (9 bijuu chakra and Asura + Indra chakra) allowed Naruto and Sasuke to meet Hagoromo. Also these 2 things were the main reason for Naruto's SP Senjutsu and Sasuke's rinnegan. Thanks to Hagoromo's gift, they awakened their powers faster and went a step further by getting Six Paths Sage Mode and Tomoe Rinnegan.