Those with their ear toward the world have many accessible teachers. Unfortunately, far too frequently, that which is being taught contradicts the plain teaching of scripture. In order to combat the propagation of false teaching, the Lord calls upon His people to teach the truth. God placed men within the New Testament church to spread the truth through teaching and preaching (Acts 13:1). He placed older men and women in the church in order to teach the younger men and women (Titus 2:1-8). He placed godly moms and dads in the home to teach the children. Every believer should have a desire to come to a point where he or she can teach others. According to the scriptures, this is the will of God (Hebrews 5:12).
Purity often involves a process. The twofold purification process in the believer's life commences at the moment of salvation. This process then progresses as the believer walks with the Lord. The individual's faith in the finished work of Christ washes away one's sin in Christ’s blood. Christ's blood cleanses completely and purifies every believer from his sin. This cleansing and purification remains forever settled between the Lord and the believer. The born-again Christian will never and can never again be any less pure in his position with the Lord. Peter confirms the positional purity when he wrote that his audience had “purified” (past tense) their souls (1 Peter 1:22). Our purity in position, settled by trusting Christ as Saviour (Titus 2:14), cannot be reversed. However, positional purity does not guarantee purity on a daily basis during our walk. The Christian's practice (his walk) must by choice remain pure.