Do we desire such knowledge of God?  Then two things follow.  First we must recognize how much we lack knowledge of God. We must learn to measure ourselves, not by our own knowledge about God, not by our gifts and responsibilities in the church, but by how we pray and what goes on in our hearts. Many of us, I suspect, have no idea how impoverished we are at this level. Let us ask God to show us.

Second, we must seek the Savior. When he was on earth, he invited ordinary people to company with him; thus they came to know him, and in knowing him to know his Father. The Old Testament records preincarnate manifestation of the Lord Jesus doing the same thing--companying with men and women, in character as the angel of the Lord, in order that they might know him.

The book of Denial tells us of what appears to be two such instances --for who was the fourth man, "like a son of the gods" (RSV), who walked with Daniel's three friends in the furnace? And who was the angel whom God sent to shut the lions' mouth when Danial was in their den (6:22)?  

The Lord Jesus Christ is now absent from us in body, but spiritually it makes no difference; still we may find and know God through seeking and finding Jesus' company. It is those who have sought the Lord Jesus till they have found him--for the promise is that when we seek him WITH ALL OUR HEARTS, we shall surely find him--who can stand before the world to testify that they have known God.

From the book "KNOWING GOD". by J. I. PACKER