Origen

(tom. xix. l. in Joan. in princ.) It is proper to observe, that the followers of other sects think this text proves clearly, that the God, whom the Jews worshipped, was not the Father of Christ. For if, say they, our Saviour said this to the Pharisees, who worshipped God as the Governor of the world, it is evident that the Father of Jesus, whom the Pharisees knew not, was a different person from the Creator. But they do not observe that this is a usual manner of speaking in Scripture. Though a man may know the existence of God, and have learned from the Father that He only must be worshipped, yet if his life is not good, he is said not to have the knowledge of God. Thus the sons of Eli, on account of their wickedness, are said not to have known God. And thus again the Pharisees did not know the Father; because they did not live according to their Creator’s command. And there is another thing meant too by knowing God, different from merely believing in Him. It is said, Be still then, and know that I am God. (Ps. 45:10) And this, it is certain, was written for a people that believed in the Creator. But to know by believing, and believe simply, are different things. To the Pharisees, to whom He says, Ye neither know Me, nor My Father, He could with right have said, Ye do not even believe in My Father; for he who denies the Son, has not the Father, either by faith or knowledge. But Scripture gives us another sense of knowing a thing, viz. being joined to that thing. Adam knew his wife, when he was joined to her. And if he who is joined to a woman knows that woman, he who is joined to the Lord is one spirit, and knows the Lord. And in this sense the Pharisees neither knew the Father, nor the Son. But may not a man know God, and yet not know the Father? Yes; these are two different conceptions. And therefore among an infinite number of prayers offered up in the Law, we do not find any one addressed to God the Father. They only pray to Him as God and Lord; in order not to anticipate the grace shed by Jesus over the whole world, calling all men to the Sonship, according to the Psalm, I will declare Thy name unto my brethren.