Earlier this year, the Rabbinical Assembly of the Conservative movement put out a new prayer book, or siddur. Siddur Lev Shalem, which means ‘full heart,’ is full of innovations. There are new translations of traditional prayers. Poems are included. There are commentaries on different parts of the Sabbath and holiday services. There are straightforward explanations of simple rites and gestures, like when and why to bow during the Amidah. The last time the Conservative movement published a new siddur was 15 years ago—not so very long. What compelled rabbis to put together a new siddur so soon? How does it differ from what preceded it? Rabbi Edward Feld, who oversaw the creation of Siddur Lev Shalem, joins Vox Tablet host Sara Ivry to talk about the whats, whys, and hows behind this new prayer book.