How do we know that Jesus is God in the flesh?

The assertion that Jesus is God manifest in the flesh is central to the Christian faith, as expressed in 1 Timothy 3:16, which calls it 'a great mystery of godliness.' This truth is foundational to understanding who Jesus is; He is both fully God and fully man, eternally existing as the Second Person of the Trinity. His incarnation highlights the divine purpose of salvation, where He took on human flesh to identify with humanity and redeem His people through His sacrificial death and resurrection, which fulfills God's redemptive plan.