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!
According to the Bible, before a man trusts Christ as Saviour, he remains the enemy of God (Romans 5:10; Colossians 1:21). But God, in His great mercy, saves His enemies as they individually choose to trust in Christ’s payment for their sins. Though a Christian has the indwelling Spirit, he never fully comprehends all that the Lord has done for him through salvation. This is why the Bible says that God’s love passes all knowledge (Ephesians 3:19). However, the more a man draws nigh to God, the more he learns about the kindness God has shown him through Jesus Christ. No matter how we learn in this life, eternity will continue to reveal to the saints the depths of the kindness of God. No wonder the greatness and marvellous nature of His love is truly beyond comprehension.
