John 8:19
Then they said to him, "Where is your Father?" Jesus answered, "You know neither me nor my Father; if you knew me, you would know my Father also."
John 8:54-55
Jesus answered, "If I glorify myself, my glory is nothing. It is my Father who glorifies me, of whom you say that he is your God.
John 16:3
And they will do these things because they have not known the Father, nor me.
John 17:3
And this is eternal life, that they may know you, the only true God, and Jesus Christ whom you have sent.
John 17:6
"I have manifested your name to the men whom you have given me out of the world. They were yours; you gave them to me, and they have kept your word.
Titus 1:16
They profess to know God, but they deny him by their deeds; they are detestable and disobedient, unfit for any good deed.
1 John 2:3-4
Now by this we know that we know him, if we keep his commandments.