Do not raise the following challenge: If so, why may we not disagree with earlier scholars regarding the revealed Torah? The answer is that the opposite [pattern] is true of perfecting the practical aspects of the mitzvot. There, the earlier sages were more perfect than the later ones. That is because the practical aspects [of mitzvot] flow from the holy vessels of the Sefirot, while the secrets of Torah and the reasons for the commandments flow from the lights of the Sefirot.
As you know, there is an inverse relationship between the vessels and the lights. Regarding the vessels, the greater ones develop first (see above, chapter 62). Hence, the earlier sages were more perfect than the later ones regarding the practical. But the opposite is true regarding the lights, where the lower ones develop first. Hence, the lower ones are more perfect than the earlier ones. Understand this well.