Kabbalah sobre Exodo 29:29

I have seen fit to divide this subject into three parts. The first concerns a person’s preparation in order to be worthy to enter the palace.¹Cf. Maimonides, Guide of the Perplexed 3.51. For it is improper for anyone “who comes to fill his hands … and dress in the priestly vestments to serve in the place of holiness” [cf. Exod. 29:29] to come and dress himself, God forbid. On the contrary, it is fitting for him to first strip from himself the shell of gross pride which prevents him from attaining the truth. He should [then] direct his heart to heaven [to pray] that he should not fail and be counted among the sinners referred to in chapter 6 of part I.