And behold it is well known that the work of the refinement of the holy sparks which is incumbent upon man is hefty work. However the refinement of that which is living and that which is vegetative is more incumbent upon man than the refinement of that which is inanimate. The essence [of the latter] is in the hands of God, may He be blessed, as it is through rain - like our master, the Ari, may his memory be blessed, wrote about the statement (Taanit 7a), "A rainy day is as great as the revival of the dead." For that is why they fixed the mention of rain in the blessing, "who revives the dead." For through the rain, the dead will be revived - they are the holy sparks in the inanimate that will rise from it, and that is their revival on the first level. And likewise did the Sages, may their memory be blessed, say (Taanit 7a), "A rainy day is as great as the ingathering of the exiles" - for the holy sparks are gathered on it. However it is clear that there is more of a need incumbent upon man to refine the living and the vegetative, since he is to refine them through eating, as it is something edible. And therefore the Holy One, blessed be He, commanded two commandments that are by way of a statute (chok). One is with the vegetative, which is forbidden mixtures (kilayim); and the other is with living flesh and that is milk and meat. For these two commandments are statutes that do not have explanations. As this is permissible by itself and that is permissible by itself, so why should they be forbidden when they are in a mixture? And it is well known that any commandment of the statute type which a man keeps has a gap in its performance, since the Satan and the nations of the world taunt Israel and mock the statute commandment saying, "What is this commandment and what explanation is there about it?" And there will hence be help and support from it to overcome the husk and to break its power, to separate the holy spark from it that is absorbed amidst the evil part of the husk and mixed in with the vegetative and with the living. And that is why the numerical count (gematria) of statute chok is that of Geihinnom - since through the performance of the statute, man extracts the good spark from the fire of Geihinnom, which is the evil that is attached to it. So Israel is victorious. Hence a person must be careful about this statute concerning the prohibition of milk and meat, so that he not stumble in it, God forbid - even with something small in it. For through it, he will have a great boost with the refinement that he needs to refine from the food.