Schweitzer's work was preceded by Martin Kähler's book "The So-Called Historical Jesus and the Historic Biblical Christ" which was published in 1896. Kähler argued that it was not possible to separate the Jesus of history from the Christ of faith and that in any case, the key goal of biblical analysis should be to better understand the Christ of faith who had influenced history. Kähler's work appealed to both conservatives and liberals and its combined effect with Schweitzer's book effectively ended the first quest.