God, who is spirit, came to this earth through the flesh of Jesus.

 K-Bible : God, who is spirit, came to this earth through the flesh of Jesus.

(In the Old Testament, it was prophesied that God would come, but since He could not come in spirit, we must know that He came through the flesh of Jesus.)

◇ In the Old Testament of the Bible, 

the Jewish religious people waited for the coming of God.

(Isaiah 66:15) "Behold, the Lord will come with fire, and His chariots like a whirlwind. He will bring His anger with fierceness, and His rebuke with blazing fire."

However, 

the <God> who was said to come was not visible,

but came as a "spirit,"

and ultimately, 

the "flesh" of <Jesus> came.