The fact that the Bible describes the Christian life as the good “fight of faith” (1 Timothy 6:12) reveals that the believer’s warfare is spiritual and never fleshly. In like manner, the enemy lives within the spiritual realm and this battle cannot be seen with the eyes of flesh. The enemy does not simply reside in a country on the other side of the world. In fact, it is no person or people group on this earth. Believers are told that they do not wrestle “against flesh and blood.” Ultimately, the saints’ enemy is the Devil, but his minions include principalities, powers, the rulers of the darkness of this world, and spiritual wickedness in high places. This means that the saints should never look to flesh and blood (mere mortals) for the source of their frustrations or victories. The fight is one of faith; the enemy, the Devil and the Lord our spiritual Captain (Hebrews 2:10).
A basic definition of communication involves making things common. When we speak to others, we express what is in our minds and hearts making those thoughts common with others. The Bible warns the believer in Ephesians 4:29 to “Let no corrupt communication proceed out of your mouth, but that which is good to the use of edifying, that it may minister grace unto the hearers.” The words that come out of our mouths should edify or build up others, not demean and degrade them. They should be strengthened by what we say. Keep in mind that corrupt communications weaken the believer (1 Corinthians 15:33). This is why Christians are instructed to put off all “filthy communication” (Colossians 3:8).
Our verbal communications involve the words that spring forth from our mouths. No doubt, the Lord considers these communications important and we should too. In today’s passage, the Lord gave some specific insights concerning His expectations of our communication. First, He wants our communication to be short and to the point – “let your communication be, Yea, yea; Nay, nay” (Matthew 5:37; see also Proverbs 10:19; Ecclesiastes 5:3, 7). Second, our word should be validated without the necessity of certifying it with vows, oaths, and swearing. In the context of the passage, the Lord Jesus forbade swearing “by heaven” (Matthew 5:34), “by the earth” (Matthew 5:35), or “by thy head” (Matthew 5:36). When we swear by these things, we put ourselves in danger of condemnation (James 5:12). Let your nay be nay and your yea be yea!
