In John 20:28, Thomas beheld the resurrected Christ and famously exclaimed: “My Lord and my God!” One way to interpret this statement is to assume that Thomas was applying both titles to Jesus. Trinitarian apologists naturally choose this option, and further claim that Thomas was therefore identifying Jesus as YHWH God himself.
The Gospel of John is thought to contain the strongest evidence for the traditional view that Jesus Christ is the second member of a Triune God. From John’s famous prologue to the declaration of doubting Thomas, there appears to be a trove of prooftexts available to the Trinitarian.
The traditional reading of John 1:1-14 has been traced back to the works of the fiery second century apologist Justin Martyr (150 AD). According to Justin, this passage indicates that Jesus pre-existed his birth as the creator of the heavens and earth and later became a human being in the womb of Mary. But the average Christian is likely unaware that Justin’s interpretation was heavily influenced by his training in Greek philosophy.