Romans 1:21
Because knowing God, they did not glorify him as God, neither were thankful, but became vain in their reasonings, and their foolish heart was darkened.
Romans 1:28-30
And as they were not careful to retain God in their knowledge, God gave them up to an undiscerning mind, to do things not expedient, Filled with all injustice, maliciousness, covetousness, wickedness:
2 Corinthians 6:15
And what concord hath Christ with Belial? or what part hath a believer with an infidel?
John 8:55
Yet ye have not known him: but I know him. And if I should say, I know him not, I should be a liar like you; but I know him, and keep his word.
John 16:3
These things will they do, because they have not known the Father nor me.
John 17:3
And this is life eternal, to know thee, the only true God, and Jesus Christ, whom thou hast sent.