John 5:23

That all men should honor the Son, etc. - If then the Son is to be honored, Even As the Father is honored, then the Son must be God, as receiving that worship which belongs to God alone. To worship any creature is idolatry: Christ is to be honored even as the Father is honored; therefore Christ is not a creature; and, if not a creature, consequently the Creator. See John 1:3 .

He that honoureth not the Son - God will not receive that man's adoration who refuses to honor Jesus, even as he honors him. The Jews expected the Messiah as a great and powerful Prince; but they never thought of a person coming in that character enrobed with all the attributes of Godhead. To lead them off from this error, our Lord spoke the words recorded in these verses.