Wickedness and evil come “from within, out of the heart,” and that is what defiles a person (Mark 7:21–23). Thus, we cannot save ourselves, because we are sinful and unclean from the inside out. But as the Lord Jesus “declared all foods clean” (Mark 7:19), so He cleanses us by His Word, which is the preaching of repentance and the forgiveness of sins. For His Word is righteous, and to live according to it is “your wisdom and your understanding” (Deut. 4:6). Cling to His Word, and also teach it “to your children and your children’s children” (Deut. 4:9). Put on this “armor of God” by hearing and heeding what He speaks to you, that you may “stand firm” in the evil day (Eph. 6:11–13). Gird yourself with the righteousness of Christ, by faith in the “gospel of peace,” and take up “the sword of the Spirit, which is the word of God,” by confessing Christ Jesus and “praying at all times in the Spirit” (Eph. 6:14–18).