Speak the Truth - Eph. 4:25

Beginning in 4:25 (and going through 6:9) Paul gets specific. He names a bunch of specific sins characterized by the Old Man that are to be put off, and godly behaviors that are to be put on. While there are some exceptions, his usual method is to state the sinful behavior that we are to put off, the godly behavior that we are to put on, and the motive or reason for the positive behavior.