Here’s a good Latin phrase to know: semper reformanda. It means “always reforming”. Christians should seek continuously to be changed (or, “reformed”)—not by culture or popular opinion—but by the Word of God.
The most outstanding theologian among the Anabaptists of the sixteenth century was Balthasar Hubmaier, who modelled well the mentality of semper reformanda, though the phrasedid not become popular until hundreds of years after his death.