Romans 3:20 says, "Because by the works of the law no flesh will be justified in His sight; for through the law comes knowledge of sin." There are so many other verses that say this very same thing. As soon as there is a rule to break, we want to break it. For that reason, it is good for us that we are not saved by the law, but rather saved by Jesus' good work. This guy looking around to see who's looking is ready to break the rules by walking on the grass even though there is a sign right in front of him telling everyone not to walk on the grass!