John 8:19
"Where is your Father?" they asked. "You know my Father as little as you know me." He replied; "if you knew me, you would know my Father also."
John 8:54-55
"Were I to glorify myself," answered Jesus, "I should have no real glory. There is One who glorifies me--namely my Father, who you say is your God.
John 16:3
And they will do these things because they have failed to recognize the Father and to discover who I am.
John 17:3
And in this consists the Life of the Ages--in knowing Thee the only true God and Jesus Christ whom Thou hast sent.
John 17:6
"I have revealed Thy perfections to the men whom Thou gavest me out of the world. Thine they were, and Thou gavest them to me, and they have obeyed Thy message.
Titus 1:16
They profess to know God; but in their actions they disown Him, and are detestable and disobedient men, and for any good work are utterly useless.
1 John 2:3-4
And by this we may know that we know Him--if we obey His commands.