God wants believers to serve Him in truth. In fact, it is this very issue that will determine “of what sort” our work is at the judgment seat of Christ.
The God of the Bible is a God of truth. On the other hand, the Devil is the great enemy of truth. The Bible says of him, “there is no truth in him.”
Sin develops, plots, schemes, and finalizes its dastardly deeds within the heart of the guilty long before the sin manifests itself to the eyes of others.
If asked concerning the origin of thoughts, the average person would swiftly respond with “the mind” or some similar answer. This is not, however, the emphasis of scripture. Overwhelmingly, scripture indicates that thoughts proceed from the heart. This does not mean the beating organ within one’s chest since the scriptures use “heart” in a different manner. When God brought judgment in the days of Noah, He saw that the thoughts of man’s “heart was only evil continually” (Genesis 6:5). In Matthew 15:19, the Bible says, “For out of the heart proceed evil thoughts.” In Luke 24:38, the Lord Jesus asked the disciples, “why do thoughts arise in your hearts?” When one’s thoughts are not according to God’s will, it is a matter of the heart not being right with God.
The connection of fear and service cannot be missed. Worldly fear brings bondage and hinders Christian service; yet godly fear encourages the believer to serve the Lord in righteousness. In our passage, fear is yoked together with truthful and sincere service. Three different verses in 1 Samuel chapter 12 make the same connection (1 Samuel 12:14, 20, 24). In Psalm 2:11, we are admonished to “serve the Lord with fear, and rejoice with trembling.” According to Hebrews 12:28, we should “serve God acceptably with reverence and godly fear.” The fear of the Lord points forward to a time of judgment and reward. A man who refuses to fear God will never serve God with a sincere heart and pure motives.