How do we know that the Nazarite vow is still relevant for Christians today?

Even though Christians do not take Nazarite vows, the underlying principles of separation from sin and commitment to the Lord's service are still relevant. Believers are called to separate themselves from that which opposes Christ and to live in a manner that honors Him. Just as the Nazarite's vow involved a promise to uphold God's commandments, Christians also make a vow of allegiance to Christ upon believing in Him, expressing their devotion through their lives. This separation is not merely external but involves an internal commitment to holiness and obedience to God's Word.