Board Thread:Naruto Discussions/@comment-5110462-20140507152631/@comment-3441296-20140509005740

maybe the sage passed on his knowledge of the powers along with the powers themselves. Both sasuke and naruto are very intelligent when it comes to using techniques so someone giving them the knowledge of how to use the powers would most likely be sufficient for them to use them and make it appear flawless. However naruto is not using his powers flawless, only with sasuke's guidance has he managed to use them efficently except for the lava rasensuriken (which is just a rasenshuriken, he would know how to use it) and the "life giving" powers he has done on instinct and even says himself he is not sure how.