Robert Purnell lists five ways that God’s Word purifies His saints:¹

The Word is purifying (John 15:3). You are clean through the Word that I have spoken to you. Now, the Word purifies in several ways:

1. As an antidote against sins. “Your word have I hid in my heart, that I might not sin against you” (Ps. 119:11).
2. As a lamp discovering the spot. “I had not known sin but by the law” (Rom. 7:7).
3. As a star conducting to Christ, the fountain of purifying (1 John 2:1-2; Zech. 13:1).
4. As a rule, according to which we are heedful to order our conversation: “Wherewith shall a young man cleanse his way, but by taking heed thereto, according to your word?” (Ps. 119:9).
5. As a motive in the precious promises of it: “Having therefore these promises, let us cleanse ourselves from all filthiness of the flesh and spirit” (2 Cor. 7:1).