14 Do all things without grumbling or disputing; 15 so that you will prove yourselves to be blameless and innocent, children of God … (Philippians 2).
To “grumble” or “complain with others in secret” is unbecoming a child of God, who is supposed to be “blameless and innocent.” The same is true about “disputing,” where in Matthew 15:19 is translated “evil thoughts,” which Jesus said come “out of the heart.” Thus, the emphasis here is secret reasoning, whether it is murmured with another or mumbled to yourself.
The word “blameless” was used to describe the “purity” of the best wines and the most precious gems, because no mixture of foreign elements were found in them. Indeed, nothing soils a soul quite like murmurs and mumblings — especially against other believers, for such elements are foreign to a pure life devoted to the Father.
Lord, help us This Day to put off any murmurs and mumblings that would soil our souls and cause dismay to You, our Heavenly Father. May we walk as pure, blameless, and innocent children of God. Amen.