Paul told Titus, “Speak the things which are fitting for sound doctrine” (Titus 2:1). Doctrine and holiness are inseparable. Calvin said, “Faith cannot be separated from good works, nor good works from faith.” Berkhof explained that doctrine is the root, with love and obedience as its fruit. Doctrine not only instructs but transforms, cultivating godliness that makes the church radiant before the world.