The difference between holiness and perfection is often blurred in modern theology, yet both Scripture and classical philosophy treat them as distinct concepts that answer fundamentally different questions. At its core, perfection concerns completeness or fulfillment. In the classical tradition associated with Aristotle and later Aquinas, perfection is teleological, meaning it is end-directed. A thing is perfect when it fully actualizes what it is meant to be. Perfection is therefore comparative and measurable relative to a standard, and it answers a specific question. Is anything missing? A perfect circle lacks none of the properties required to be a circle. A perfect knife fulfills its cutting purpose without deficiency. This understanding aligns closely with the New Testament’s use of the Greek word teleios (τέλειος), which means complete, mature, or brought to its intended end. Jesus uses this term in Matthew 5:48 (NIV), which says, “Be perfect, therefore, as your heavenly Father...