From today’s key passage of Scripture, we’re going to see how adultery is not only a sin in the bed, but it is a sin in the head. Adultery can be both physical and mental. It can be both on the inside and the outside. In a day and age where sexual immorality is running rampant, not only are marriages being ruined, but even the very concept of a biblical marriage is being tainted. Thankfully, Jesus gives us three principles to remember so we can guard against this terrible sin of adultery and avoid the look that kills.