Hasidut untuk Imamat 1:7

And it appears to me as it is present in Eruvin 63a what they explained, that the children of Aharon the priest will light the fire on the altar (Leviticus 1:7) even though the fire comes down from heaven, it is a mitzvah to bring common fire, etc. And the Rema (Moshe Isserles) explained in his book (Torat HaOlah III, chapter 2) that a person needs to become aroused to kindle with a common fire, and then the kindling of Y"ah comes from heaven, etc, see there. And the words of the Tosfot, in Eruvin (Mai) teach that they offered incense on the outside altar, because if it was on the inside, fire from heaven would not have descended, etc, however in the Torat Kohanim it is taught that they offered in the inside altar, and there they were burned, and this needs to be studied more deeply, until here.