""A Scriptural Defense of the Doctrine of the Trinity: Or a Check to Modern Arianism"" is a religious text written by Hiram Mattison and originally published in 1848. The book is a defense of the doctrine of the Trinity, which teaches that God is one being in three persons: the Father, the Son (Jesus Christ), and the Holy Spirit. Mattison argues that this doctrine is supported by scripture and refutes the beliefs of Arianism, a heretical belief that...