So, the questions is not do we know of God or know of Jesus Christ but do we know the Father and the Son. Jesus said that know one knows the Father except the Son and to whom the Son reveals him. (Luke 10:22) Jesus is God in human flesh. The writer of Hebrews said that he is the radiance of his glory and the exact representation of his nature. (Hebrews 1:3) Jesus said to his disciples, “If you had known me, you would have known my Father also; from now on you know him, and have seen him.” (John 14:7) Jesus came for two very important reasons: that we may know God and to save us from our sin.
In Isaiah chapter 6, Isaiah sees the Lord seated on his throne and falls down face first saying,
“Woe is me, for I am ruined!
Because I am a man of unclean lips,
And I live among a people of unclean lips;
For my eyes have seen the King, the LORD of hosts.”
Isaiah’s eyes had seen the Lord of glory and all pride fell away. The Lord justifies him, declaring Isaiah clean in his sight. Then Isaiah is commissioned to preach the gospel among his people. Isaiah want to know for how long and the Lord said until all is complete.
The church has been commissioned by the Lord Jesus Christ to make disciples, baptize them in the name of the Triune God, and teach them to observe all that he commanded until his return. (Matthew 28:18-20)