“If you alter or obscure Jesus’ portrait of God in order to attract Bible converts, you don’t get converts to Jesus, you get converts to the Bible. This is not evangelism, but deception.” (John Piper)
To be known, he has to be comprehended. He is too great to be fully comprehended by any one person, even if he reveals himself to that person. Even if that person knows God in part, that part has to be communicated through words. Words are a communication system frought with misapprehension of meaning. So all portraits, Biblical or otherwise are portraits of, and conversation to, illusion. The more sure a person is they know God, the worse that illusion is.