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Acts 10:15

The Source of Holiness

By: Mike Mazzalongo

In Acts 10:15, the Lord tells Peter: "What God has cleansed, no longer consider unholy." This statement is far more than a simple command to eat what was once considered unclean food. It is a declaration of one of the most powerful truths in Scripture: God alone determines what is holy or unholy, clean or unclean, acceptable or rejected. Things, ceremonies, or people do not possess inherent spiritual value within themselves; their holiness is entirely derived from God's word and God's will.

Holiness Defined by God

Peter's vision demonstrates that holiness is not intrinsic to food, animals, or ritual. Under the Law of Moses, God assigned distinctions–certain foods, days, and practices were clean or unclean because God decreed it so, not because of anything inherent in them. When God removed these distinctions in Christ, they ceased to exist as spiritual boundaries. The animals in Peter's sheet had not changed; what had changed was God's determination. This same principle applied to the people Peter would soon meet: Gentiles. They were not intrinsically unclean, as the Jewish mind thought, nor did they become holy through circumcision, festivals, or traditions. They were made holy when God cleansed them through faith and baptism in Christ (Acts 10:44-48).

From Judaism to Christianity

This truth explains the great transition in redemptive history. Judaism was not holy because of its age, ceremony, or national heritage. It was holy only because God had chosen it as the means to prepare the world for Christ. Once Christ came, those external forms lost their value as ends in themselves. The sacrifices, the temple, the priesthood–all had meaning only because God gave them meaning, and when God fulfilled them in Christ, they passed away (Hebrews 8:13; Hebrews 10:1). Christianity, therefore, does not replace Judaism with another set of ceremonies but fulfills it by grounding holiness in Christ Himself. God has declared Jesus as the eternal High Priest, the perfect sacrifice, and the true temple. Value now resides not in forms or rituals but in belonging to Christ.

The Challenge to All Religions

This reality also exposes the vanity of all other religious pretensions to holiness. Ancient pagan rites, elaborate liturgies, age-old traditions, ornate vestments, or massive followings–none of these impart holiness. They may inspire awe or stir emotion, but they cannot confer spiritual value. Holiness cannot be manufactured by human art or sustained by human ceremony. It is always and only a matter of God's declaration. Thus, whether in Peter's day or our own, God's voice remains decisive: "What God has cleansed, no longer consider unholy." This places the focus where it belongs–on the divine will, the work of Christ, and the cleansing of the Spirit. All else, no matter how impressive or venerable, is only pageantry unless sanctified by God Himself.

Discussion Questions
  1. Why is it important to remember that holiness is determined by God and not by human tradition or religious practice?
  2. How does Peter's vision in Acts 10 illustrate the transition from Judaism to Christianity?
  3. What modern religious practices risk being seen as holy when, in reality, they may not carry God's sanctifying declaration?
Sources
  • ChatGPT, Discussion on Acts 10:15 and the Nature of Holiness, Oct. 1, 2025
  • F.F. Bruce, The Book of Acts
  • Everett Ferguson, The Church of Christ: A Biblical Ecclesiology for Today
  • Alexander Campbell, The Christian System
18.
Sincerity is Not Enough
Acts 10:34-36