(5) Clearly, the purpose of the hishtalshelut of the worlds and their descent, degree by degree, is not for the sake of the higher worlds, because for them this is a descent from the light of His Countenance, blessed be He. But the ultimate purpose [of creation] is this lowest world, for such was His will, blessed be He, that He shall have satisfaction when the sitra achara is subdued and the darkness is turned to light, so that the Divine light of the En Sof, blessed is He, shall shine forth in the place of the darkness and sitra achara throughout this world, all the more strongly and intensely, with the excellence of light emerging from darkness, than its effulgence in the higher worlds, where it shines through “garments” and in concealment of the Countenance, which screen and conceal the light of the En Sof, blessed is He, in order that they should not dissolve out of existence.
(6) For this purpose, the Holy One, blessed is He, gave to Israel the Torah which is called “might” and “strength,”6Shir Hashirim Rabbah 2:10; Zohar II:58a; III:269a; cf. Zevachim 116a. as the Rabbis, of blessed memory, have said7Sanhedrin 100b. that the Almighty puts strength into the righteous in order that they may receive their reward in the hereafter, without being nullified in their very existence, in the Divine light that will be revealed to them in the hereafter without any cloak, as is written, “Your teacher shall no longer be concealed from you [literally: He will not conceal Himself from you with robe and garment]…but your eyes shall see your Teacher.”8 Isaiah 30:20. It is also written, “For they shall see eye to eye…”9 Isaiah 52:8. and “You shall no longer have the sun for light by day…for the Lord shall be to you for an everlasting light….”10 Isaiah 60:19-20.

§ It was taught in the mishna: If a person is ill and requires food due to potential danger, one feeds him according to the advice of medical experts. Rabbi Yannai said: If an ill person says he needs to eat, and a doctor says he does not need to eat, one listens to the ill person. What is the reason for this halakha? It is because the verse states: “The heart knows the bitterness of its soul” (Proverbs 14:10), meaning an ill person knows the intensity of his pain and weakness, and doctors cannot say otherwise. The Gemara asks: It is obvious that a person knows himself better than anyone else does. Why does this need to be stated explicitly? The Gemara answers: It is lest you say that the doctor is more certain because he has had more experience with this condition. Therefore, the verse teaches us that even so, it is the ill person who knows his own suffering better than anyone else.

You must not see the donkey of your brother (Deut. 22:4) crouching under his burden (Ex. 23:5) etc - that a person that busies themselves with the issues and businesses of this world, behold, the world is like a burden for them, and they crouch under its burden, and the text says "you must not ignore": this is a warning for the tzadik to pray for that person. And this is easy to understand.