The Scripture is a historical record. As a historical record, it must tested by the historical method to verify its validity as a primary document. The historical method is composed of three basic tests — the internal test, the external test, and the bibliographical test. The internal test determines whether the document agrees or contradicts with itself. The external test determines whether other historical records can validate the document. The bibliographical test examines the number of copies, elapsed time between the original document and copies, and degree of accuracy between the copies. The Bible passes each of these tests and is therefore a verified primary document.
There are a number of proof texts from Scripture which support Christ’s deity. First, Christ descended from heaven (John 3:13). No mere man has ever ascended into Heaven and returned to speak of Heavenly things. The only one who has been in Heaven and come down from Heaven to speak about Heavenly things was the Son of Man — God in human flesh.
- No one has ascended into heaven, but He who descended from heaven: the Son of Man. - John 3:13
Second, Christ bears the title Eternal Father (Isaiah 9:6). The title does not imply that Christ is the Father. The Hebrew term translated as Eternal Father means Father without end. However, this title should not be confused with the position of the First Person of the Godhead — the Father. In that sense, Christ is the Second Person of the Godhead — the Son. The title is Isaiah 9:6 is used in the sense of father of a family -- one who protects and provides. In the context of Isaiah’s prophecy, Christ will be born as a Child who becomes a King who will be a Father to the people of His kingdom without end.