Why is knowing Jesus Christ important for understanding God?

The apostle John establishes that no one has seen God at any time; the only begotten Son has made Him known (John 1:18). Jesus Christ, as both fully God and fully man, is the faithful witness of hidden heavenly truth. This makes Him the only adequate mediator through whom we can understand the nature and essence of God. In Revelation 1:5, He is described as the 'faithful witness,' emphasizing that through Jesus, we not only learn about God's character but also receive the full revelation of His grace and truth. Thus, to know Jesus is to gain access to the revelation of God, fulfilling the yearning for divine understanding.