What does the Bible say about purifying ourselves?

In 1 John 3:3, we find that every man who has hope in Christ purifies himself. This process isn't about our works but is deeply tied to faith in what Christ has accomplished. The act of purifying oneself is an evidence of the transformative work of God's grace in a believer's heart. As seen in 1 Peter 1:22, we purify our souls in obeying the truth through the Spirit, which emphasizes the necessity of faith and obedience as integral to purification. Hence, purifying oneself is ultimately a response to our belief in God's promises and the work of the Holy Spirit within us.