Perhaps the most significant difference between Conservative and Orthodox siddurim is found in the Birkhot HaShachar section; this part of the morning service traditionally contained many passages describing sacrifices that used to be carried out in the Temple in Jerusalem. Furthermore, Harlow briefly discusses details some of the morning prayers, such as the Birkhot HaShachar celebrating the renewal of life upon a new day. Many passages on animal sacrifices are not present in Siddur Sim Shalom. Harlow writes "The sacrificial ritual in ancient times was construed as means by which a Jew gained atonement for sin. After the destruction of the Temple and the consequential end of sacrifices there, the Jewish people were deprived of this means. To replace the readings on sacrifices, modern Conservative prayerbooks cite the talmudic teaching that deeds of loving-kindness now atone for sin; they draw upon rabbinic tradition to emphasize teachings about atonement and necessary behavior."
