Theological Background to Sola Fida
Sola Fida: Lesson 6
During this same period, as he developed his mature understanding of faith, Luther was even more explicit about his debt to Melanchthon. Following the Vulgate rendering of Hebrews 11:1, where faith is defined as “the substance [substantia] of things hoped for” (KJV),42 Luther, in harmony with the medievals, had long understood faith to be a quality present in those being made righteous. Like grace, it played a necessary role in justification—but only as it became properly “formed.” Hence, the medieval formula “faith formed by love” served to distinguish mere intellectual assent from that faith joined with love and so contributing to righteousness.
Melanchthon, from at least 1519, began to read the Greek pistis (“faith”) as synonymous with the Latin fiducia (“trust”). By the time he drafted the first edition of his Loci, he was insisting that, in accordance with ancient usage, the biblical uses of pistis and its verbal form almost always mean “trust.”
He thus came to understand justifying faith not simply as trust but as trust that the righteousness “hoped for,” on account of God’s favor, already existed. As such, Luther could now speak of justification in the present tense, not merely as the future result of an ongoing process
No longer did this formula express the idea that one was partly sinful and partly righteous, or a present sinner with the future hope of being made righteous; the Christian now remained in himself completely a sinner yet, by means of faith and in the eyes of God, completely righteous.
