For a relationship as intimate as that with one’s own spirit, we might assume that the only spiritual tools provided to individuals have this degree of personalization, but this of course, is not so. Printed siddurim were designed with other goals in mind. As a technology the siddur only became widely adopted by the Jewish public in the mid-19th century. Printers of siddurim have designed their siddurim to appeal to mass markets, each edition of the siddur representing a specific communal custom, and when translated, the specific language of a community. It’s no surprise then that for many Jews their spiritual identity is closely mapped to the liturgical variations represented by their Siddurim.