Murmuring is a grievous sin harmful to everyone involved or impacted. When God’s people murmur, they do so because their heart is not sufficiently focused upon the Lord. Various forms of the word murmur occur forty times in the word of God. Interestingly, the number forty throughout scripture is frequently connected to a time of testing or trial. The vast majority of these occurrences reflect people who were displeased with something the Lord was responsible for doing. Their displeasure with the Lord caused them to voice their frustrations to others. Murmuring generally manifests itself outwardly, but at its root is a heart problem (Matthew 12:34; Matthew 15:19). It comes as no surprise that the medical community uses the term murmur to describe a heart problem.
Fear introduced is faith attacked. As such, we should not be partakers of the world’s fears. Instead, we should “sanctify the LORD of hosts himself; and let him be” our fear (Isaiah 8:13). Throughout scripture, the Lord admonished His people not to fear the world. Why? The answer is twofold: (1) the Lord was with them (Genesis 26:24) and (2) fear of the world yields bondage (Proverbs 29:25). This worldly bondage never originates with the Lord (Romans 8:15) for He has given Christians a sound mind (2 Timothy 1:7). We need not fear those who can destroy the body (Matthew 10:28); rather, we ought to say the Lord is our helper, and we will not fear what men will do unto us (Hebrews 13:6).