One of the integral passages of Biblical Christianity is, “And the Word became flesh and dwelt among us…”
There is no escaping the significance of this fact. John, having already established Jesus is God, now tells us how he knows this is true. God in Christ has come to live in their midst, and He has directly informed them of Himself and about Himself.
And they literally beheld His glory, as the only begotten of the Father – full of grace and truth. God was fully on display. His nature. His diety. His character. His love. Then He submitted Himself to death on the cross and rose from the dead to prove this was not imagined.
None of this had ever been known to this degree before, and it has not been revealed to this degree since. It is the most important moment in the history of the world – and it is the most significant event in each of our lives.
Other faith systems claim many things about the god or gods they serve. Chief among the claims of the Islamist faith is god (Allah) cannot be known. This is one of the central messages of their messenger sent from their god. Muhammad said Allah cannot be known. Muhammad literally wrote Allah is the chief of all deceivers. (Qu’ran Sura 3:54, 7:99, 8:30)
When it comes to Bhuddism or Hinduism, the same is true. In Bhuddism, god transcends everything and is in everything and is a mystical force and not a person. There is no personality to know, but a mystical perspective to be gained. In Hinduism, there are at least 300,000 gods, and they are unknowable on that basis alone. Too many to count. And they are capricious, (as is also ascribed to Allah.) You can never know what those gods may do. All you can do is attempt to appease them by your conduct.
Jesus, on the other hand, is God-in-Flesh. This is the whole point of Biblical Christianity. There can be no doubt. Here He is. This is it. God has come into the world He created to fully reveal Himself. If you are truly searching for God, He can be found. He can be known. Furthermore, God has revealed He desires to be known. He desires a personal relationship with every man, and His entry into His creation proves this is so.
If you desire to know God, you can. All you need to do is study the God of the Bible and He will reveal Himself to every heart open to the desire to know Him. Later, Jesus told Philip, “He who has seen Me has seen the Father.” (John 14:9) God came into the world so we may behold His glory as truth and not imagination.