people to thank God repeatedly and to lead a modest and humble life. Jews therefore eat unleavened bread and bitter herbs on Passover in memory of what happened to the Israelites. And they eat unleavened bread for a week because if the eating were only for one day, Jews might not notice it. Maimonides taught that Shavuot (mentioned in ) is the anniversary of the Revelation on Mount Sinai. To increase the importance of this day, Jews count the days that pass from the preceding festival of Passover, just as one who expects an intimate friend to visit on a certain day counts the days and even the hours until the friend comes. This is why Jews count the days that pass since the offering of the Omer, between the anniversary of the Israelites' departure from Egypt and the anniversary of the Lawgiving. The Revelation at Mount Sinai was the object of the Exodus from Egypt, and thus God said in , "I brought you to myself." As the Revelation at Mount Sinai took place on one day, so Jews keep its anniversary only one day. Maimonides wrote that Jews likewise keep Rosh Hashanah (mentioned in ) for one day, for it is a day of repentance, on which Jews are stirred up from forgetfulness, and for this reason the shofar is blown on that day. According to Maimonides, Rosh Hashanah is a preparation for and an introduction to Yom Kippur, as is plain from the tradition about the days between Rosh Hashanah and Yom Kippur. Maimonides taught that Sukkot (discussed in and 39–44), which is a feast of rejoicing and gladness, is kept seven days, so that the festival may be more noticeable. It is kept in the autumn because, as says, it is "When you have gathered in your labors out of the field," and thus when people can rest free from pressing labors. Maimonides cited the ninth book of Aristotle's Ethics for the proposition that harvest festivals were a general custom, quoting Aristotle to report, "In ancient times, the sacrifices and assemblies of the people took place after the ingathering of the corn and the fruit, as if the sacrifices were offered on account of the harvest." Maimonides noted the temperate nature of autumn as another reason for Sukkot falling in that season, making it possible to dwell in booths free of great heat and troublesome rain.