Romans 1:21
because, when they knew God, they did not glorify him as God, nor were they thankful; but they became perverse in their reasonings, and their wicked heart was darkened;
Romans 1:28-30
And as they refused to acknowledge God, God delivered them up to an undiscerning mind, to do detestable things;
2 Corinthians 6:15
What agreement has Christ with Belial? What connection has a believer with an unbeliever?
John 8:55
And yet you have not known him. But I know him; and if I should say that I do not know him, I should be like yourselves, a liar. But I know him, and I keep his word.
John 16:3
And these things they will do, because they know neither the Father nor me.
John 17:3
And this is life eternal, to know thee, the only true God, and Jesus Christ whom thou has sent.