Remember the TVs of years past where you often saw fuzzy images with lines?
This memory is of the opposite of HighDefinition TV.
The old TVs were analog (wave-based) while the new TVs are digital (discrete units of information).
It would be hard for us to go back to low definition for our TVs and other visual devices.
HighDefinition is a good thing in the visual realm but it is also a good thing in all realms.
Jesus came to provide HighDefinition to God.
Before Jesus came the Jews, who had the best Understanding of God, still did not "get it" or should I say "get Him".
You cannot describe with words what may be grasped with an Image.
As powerful and inspired as the Old Testament is it does not communicate fullness of God.
So, God came in the Flesh to Manifest Himself more clearly.
And the Word was made Flesh, and dwelt among us, (and we beheld his Glory, the Glory as of the only begotten of the Father,) full of Grace and Truth. - Joh 1:14
Interestingly enough though, Jesus said He must go away so that the Comforter, the HolySpirit, could come.
So, as well as Christ Jesus clarified God prividing higher definition of Him, He knew that HolySpirit would provide even higher definition of Him.
Now, before you get excited about a hint of denigration of Jesus let me assure you that He is the fulness of God in bodily form:
For in him dwelleth all the fulness of the Godhead bodily. - Col 2:9
Jesus saith unto him, Have I been so long Time with you, and yet hast thou not known me, Philip? he that hath seen me hath seen the Father; and how sayest thou then, Shew us the Father? - Joh 14:9
However, Jesus said this about Himself:
Ye have heard how I said unto you, I go away, and come again unto you. If ye loved me, ye would rejoice, because I said, I go unto the Father: for my Father is greater than I. - Joh 14:28