John Chrysostom

(Hom. xxxi. 1) He means not here, that to believe on the Son is sufficient to gain everlasting life, for elsewhere He says, Not every one that saith unto Me, Lord, Lord, shall enter into the kingdom of heaven. (Matt. 7) And the blasphemy against the Holy Ghost is of itself sufficient to send into hell. But we must not think that even a right belief on Father, Son, and Holy Ghost, is sufficient for salvation; for we have need of a good life and conversation. Knowing then that the greater part are not moved so much by the promise of good, as by the threat of punishment, he concludes, But He that believeth not the Son, shall not see life; but the wrath of God abideth on him. See how He refers to the Father again, when He speaketh of punishment. He saith not, the wrath of the Son, though the Son is judge; but maketh the Father the judge, in order to alarm men more. And He does not say, in Him, but on Him, meaning that it will never depart from Him; and for the same reason He says, shall not see life, i. e. to shew that He did not mean only a temporary death.