On The History And Mystery Of, Those Called, The Sacraments: Showing Them To Be Jewish Institutions And Not Ordinances, Appointed By Christ, To Be Observed In His Church (1846) is a book written by Jacob Post. The book explores the history and mystery of the sacraments, which are often seen as ordinances appointed by Christ to be observed in his church. Post argues that the sacraments are actually Jewish institutions, and not specifically ordained...