How do we know that Jesus is both fully God and fully man?

In Luke 8:22-25, we witness the dual nature of Christ as both fully God and fully man. Jesus’ human side is evident when He falls asleep in the boat, displaying exhaustion. However, His divine nature is powerfully revealed when He commands the wind and the sea to obey Him, resulting in immediate calm. This interplay showcases that while Jesus experienced human frailty, He never ceased to be God incarnate. Theologically, this is a profound mystery, affirming that Jesus is both completely human and completely divine, ensuring that He can mediate between God and humanity effectively. Moreover, this unique nature allows Him to provide salvation to sinners by atoning for sin as a man while possessing the divine authority to forgive sin.