John 8:19
They said therefore to him, Where is thy Father? Jesus answered, Ye know neither me, nor my Father. If ye knew me, ye would know my Father also.
John 8:54-55
Jesus answered, If I glorify myself, my glory is nothing. It is my Father that glorifieth me, of whom ye say, He is our God:
John 16:3
And these things will they do, because they neither know the Father nor me.
John 17:3
And this is the everlasting life, to know thee, the only true God, and Jesus Christ whom thou didst send.
John 17:6
I manifested thy name to the men whom thou gavest me out of the world. Thine they were, and thou gavest them to me; and they have kept thy word.
Titus 1:16
They profess that they know God, but by their works they deny him, being abominable and disobedient, and for every good work reprobate.
1 John 2:3-4
And hereby we know that we know him, if we keep his commandments.