The Bible teaches us that “if any man be in Christ, he is a new creature” (2 Corinthians 5:17). Following salvation, a man's life should display visible changes as he seeks to put off his former conversation. According to scripture, that former conversation fulfilled “the desires of the flesh and of the mind” (Ephesians 2:3). By the grace of God, change is possible because every believer has been redeemed from his “vain conversation” (1 Peter 1:18). The apostle Paul is a great example. Before meeting the Lord on the road to Damascus, Paul's conversation or lifestyle involved mercilessly persecuting the church (Galatians 1:13). In his new life with Christ, he immediately began preaching the very faith he once destroyed (Galatians 1:23). When a person truly places his faith for salvation in the finished work of Christ, his conversation will change accordingly.
The believer is to allow no place for bitterness within his life. The book of Ephesians directly associates bitterness with the sins of wrath, anger, clamour, evil speaking, and malice. Each of these sins grieves the Spirit of God and ought to grieve the believer. As such, Christians are admonished to put away all bitterness. As bitterness shows itself in the depths of our hearts, we ought to immediately seek the Lord and plead for His help in removing it by its root. In a similar passage (Colossians 3:8), we are admonished to “put off” many of these other sins mentioned. Always keep in mind that bitterness does not edify the believer or those around him, nor does it glorify the Lord. Simply choose to obey God by putting away and putting off bitterness.