If we say we have fellowship with Him and keep walking in the darkness, we are lying and do not practice the truth. (TLV)
Scripture, here and in many other places, affirms the principle that we are wise to judge a man not by his words but by his actions. A truth teller is someone whose words and actions are consistent, not contradictory. By avoiding and/or eliminating the presence of dishonest people around me and, when possible, seeking to associate with truth tellers, I have found my life to be more peaceful, less stressful and more productive.