Jesus is in the Old Testament concealed and in the New Testament revealed

  "Who hath ascended up into heaven, or descended? who hath gathered the wind in his fists? who hath bound the waters in a garment? who hath established all the ends of the earth? what is his name, and what is his son's name, if thou canst tell? " Proverbs 30:4 KJV

  "Therefore the Lord himself shall give you a sign;  Behold, a virgin shall conceive, and bear a son, and shall call his name Immanuel."  Isaiah 7:14 KJV 

  "And she shall bring forth a son and thou shalt call his name  JESUS: for he shall save his people from their sins. Now all this was done, that it might be fulfilled which was spoken of the Lord by the prophet, saying, BEHOLD, A VIRGIN SHALL BRING FORTH A SON, AND THEY SHALL CALL HIS NAME IMMANUEL, which being interpreted is, God with us. Matthew 1:21-23 KJV