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.
Men get into trouble when they begin to think too highly of their own thoughts. If they are not careful, these opinions will become the driving force in their decision making. This will mean that the word of God finds itself in competition for the seat of authority. The sad truth is that men often fail to notice within themselves this substitution of authorities. While their mouths may falsely testify of a loyal submission to the scriptures, their actions testify that their opinions are instead leading the way. The Devil works subtly because he knows how to gradually lead men astray by keeping them from noticing any abrupt changes within their hearts and outward deeds. By the time rebellion is detected, the Devil has a stronghold only broken by prayer and heartfelt submission to God.
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.
