The Messiah would be both man and God.
OT Prophecy NT Fulfillment
Isaiah 9:6-7c
"[1] Nevertheless the dimness shall not be such as was in her vexation, when at the first he lightly afflicted the land of Zebulun and the land of Naphtali, and afterward did more grievously afflict her by the way of the sea, beyond Jordan, in Galilee of the nations. [2] The people that walked in darkness have seen a great light: they that dwell in the land of the shadow of death, upon them hath the light shined."
John 10:30
"I and my Father are one."
John 12:45
"And he that seeth me seeth him that sent me."
John 14:7
"If ye had known me, ye should have known my Father also: and from henceforth ye know him, and have seen him."

Tanakh - Neviim - Isaiah 9:5-6c

"[5] For a child is born unto us, a son is given unto us; and the government is upon his shoulder; and his name is called Pele-joez-el-gibbor-Abi-ad-sar-shalom; [6] That the government may be increased, and of peace there be no end, upon the throne of David, and upon his kingdom, to establish it, and to uphold it through justice and through righteousness from henceforth even for ever. The zeal of HaShem of hosts doth perform this."

 Hebrew OT - Isaiah 9:5-6c

ומכש-לע הרשמה יהתו ונל-ןתנ ןב ונל-דלי דלי-יכ   [5]
.םולש-רש דעיבא רובג לא ץעוי אלפ ומש ארקיו       

דוד אסכ-לע ץק-ןיא םולשלו הרשמה הברםל   [6]
התעמ הקדצבו טפשמב הדעסלו התא ןיכהל ותכלממ-לעו      
.תאז-השעת תואבצ הוהי תאנק םלוע-דעו      

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