You May Not Kindle Fire on Shabbat but You May Before It

"You shall not kindle fire" (Exodus 35:3) - why is it stated? Because it says (Exodus 34:21), "In plowing and in harvest you shall rest," rest from plowing at the time of harvest, rest from the eve of the seventh year into the seventh year. I have only that he rests from the eve of the seventh year into the seventh year; how do I know that he likewise rests from the eve of Shabbat into the Shabbat? And reason supports it, since the seventh year is for the sake of the LORD and the Shabbat is for the sake of the LORD, if you have learned that he rests from the eve of the seventh year into the seventh year, so too from the eve of Shabbat into the Shabbat. And furthermore by an inference from minor to major, if the seventh year, for which one is liable to neither excision nor death by the court, requires that he rest from its eve, then the Shabbat, for which one is liable to excision and death by the court, by reason requires that he rest from its eve. Or perhaps he may not be permitted to light the lamp, or keep the hot water warm, or make himself a fire? Scripture teaches, "You shall not kindle fire on the Shabbat day" - on the Shabbat day you may not kindle, but you may kindle from the eve of Shabbat into the Shabbat.