Again, the kingdom of heaven is like unto treasure hid in a field; the which when a man hath found, he hideth, and for joy thereof goeth and selleth all that he hath, and buyeth the field.
Matthew 13:44
"A man might pass over the place where treasure had been 
concealed. In dire necessity he might sit down to rest at the foot of a tree, not knowing of the riches hidden at its roots.
So it was with the Jews. As a golden treasure, truth had been intrusted to the Hebrew people.
The Jewish economy, bearing the signature of Heaven, had been instituted by Christ Himself.
In types and symbols the great truths of redemption were veiled. Yet when Christ came, the Jews did not recognize Him to whom all these symbols pointed.
They had the word of God in their hands; but the traditions which had been handed down from generation to generation, and the human interpretation of the Scriptures, hid from them the truth as it is in Jesus. The spiritual import of the sacred writings was lost. The treasure house of all knowledge was open to them, but they knew it not.
God does not conceal His truth from men.
By their own course of action they make it obscure to themselves."
E.G.W.