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.
Sin withholds good things from man that he would otherwise have opportunity to enjoy. Instead of peace, sin brings unrest, frustration, and heartaches.
The Bible does not always paint man in a positive light, yet it always paints him accurately. According to scripture, there is no man that sinneth not.
Murder is an act of hatred originating in the heart. Man, however, is not the inventor of murder. It is, in fact, the will and work of Satan.
At times, God called people to enter into war with the goal of killing their enemies. The Bible clearly distinguishes between this type of killing and murder.