The need to combine two principles in learning that at first glance seem contradictory

It is worth mentioning that my son Izhak was aware of the need to combine two principles in learning that at first glance seem contradictory. One is the idea of saying the words and going on until the end of the book or chapter, and then the other of review. He was aware of the greatness and importance of Rav Nahman's idea of “saying the words and going on.” But on the other hand, often people often forget the importance of review as Rav Nachman said himself in Sefer Hamidot, “He who learns, but does not review etc.” some people are naturally brilliant in one field or the other but that does not exclude the importance of learning Gemara Physics and mathematics even if you are not naturally talented in this area. It is like saying you do not need to be moral even if you are not naturally moral. Positive values need to be adhered to even against one’s natural inclination, The issue is not how talented you are, but rather what are the areas that are important to concentrate on even if you are not in order to become a whole and wholesome human being.