"God hides nothing. His very work from the beginning is revelation,- a casting aside of veil after veil, a showing unto men of truth after truth. On and on from fact Divine He advances, until at length in His Son Jesus He unveils His very face."
George MacDonald

Romans 1:19-20 New International Version (NIV)
19 since what may be known about God is plain to them, because God has made it plain to them. 20 For since the creation of the world God’s invisible qualities—his eternal power and divine nature—have been clearly seen, being understood from what has been made, so that people are without excuse.

There are two ways that theologians say God reveals Himself: through general and special revelation. General revelation means God's creation, and special revelation means direct revelation from God such as the incarnation and the Bible. Jesus is the Word of God. He was in the beginning when God made man in His own image. And then God ultimately revealed Himself to us through the life and death of His very Son.

Matthew 27:51
"Then, behold, the veil of the temple was torn in two from top to bottom; and the earth quaked, and the rocks were split,"

When Jesus died on the cross the veil of the temple was torn in two, representing the fact that He became our high priest, and He became the way to God. Jesus is the way, the truth, and the life. God's word is Truth.

Hebrews 1:1-3
In the past God spoke to our ancestors through the prophets at many times and in various ways, 2 but in these last days he has spoken to us by his Son, whom he appointed heir of all things, and through whom also he made the universe. 3 The Son is the radiance of God’s glory and the exact representation of his being,sustaining all things by his powerful word.

John 14:9-11
9 Jesus answered: “Don’t you know me, Philip, even after I have been among you such a long time? Anyone who has seen me has seen the Father. How can you say, ‘Show us the Father’? 10 Don’t you believe that I am in the Father, and that the Father is in me? The words I say to you I do not speak on my own authority. Rather, it is the Father, living in me, who is doing his work.11 Believe me when I say that I am in the Father and the Father is in me;
John 10:30

Jesus said, "I and the Father are one."