Although scholars have debated the link between empirical senses and belief in the Gospel of John, few have queried their own presuppositions about the invisibility of God. In this study, Luke Irwin establishes the value of God's physical incarnation for belief, arguing that the theological nature of belief derives from a God who makes himself physically visible in the world. Irwin builds on recent work on divine embodiment in the Hebrew Bible and New Testament and illuminates the Jewish context for John's Gospel. He also explains John's understanding of 'seeing' as a positive component of belief-formation and resolves the Johannine relationship between 'seeing' and 'believing'. Showing how God is the ultimate target of belief, Irwin argues that unless God becomes physically visible in Jesus, belief cannot be attained.