16“For from his fullness we have all received, grace upon grace…”
The holy evangelist (John) informed us earlier that without Christ life, light, and mercy are unattainable. Only the believer in Christ’s name enjoys the power and the prerogative to become a child of God. This places all men, including all saints, whatever their name, into one category and labels all as sinners and liars devoid of grace as long as they rely on themselves and have not Christ. For all the descendants of Adam were born in sin and in disfavor with God, with nothing good in them, but imbued with falseness, hypocrisy, lies, and deceit. It avails nothing that they feign piety and saintliness, that they point to their good works, that they want to be regarded as humble and spiritual; all this is useless unless they become children of God through faith in Christ.
Luther, M. (1999). Luther’s works, vol. 22: Sermons on the Gospel of St. John: Chapters 1-4. (J. J. Pelikan, H. C. Oswald, & H. T. Lehmann, Eds.) (Vol. 22, p. 131). Saint Louis: Concordia Publishing House.