The Lord detests murmuring. He hates it so much that He sent fire among the Israelites because of their murmurings (Numbers 11:1). In the New Testament, He warned believers to avoid falling prey to the same sin as the Israelites (1 Corinthians 10:1-14). Additionally, New Testament believers are admonished to do all things without murmurings (Philippians 2:14-16). People murmur as they focus on events within their lives rather than upon the Lord and His word. Yet, the Christian’s life events are ultimately brought to pass, either directly or indirectly, by a loving and caring God. The Lord abhors murmuring because it directly insults His working and provision in our lives.
This world, though it consistently fails to recognize and know the Lord, should consistently recognize Christ's conversation through the life of the believer. Our conversation should always match, or become, the gospel of Christ and the new life that we have in Him. Our conversation should be holy because the Lord is holy (1 Peter 1:15). In 2 Peter 3:11, we learn that the dissolving of this world ought to cause us to walk “in all holy conversation and godliness.” In other words, our practical Christian life should resemble the change inside of us that took place at salvation. Others should see the Lord Jesus Christ in our actions and in our way of life.
