The first thing I do in my evangelism classes is teach everybody the 10 Commandments. Now you have the opportunity to learn them too!
The 10 commandments are fundamental to effective witnessing because the law is written on everyone’s heart—it’s called the conscience—(Romans 2:15); it’s so important that every Christian should know them, but sadly, most don’t. The Bible also says that the Law (the 10 Commandments) stops a sinner from justifying himself and brings knowledge of sin (Romans 3:19-20); the Law is a schoolmaster that leads people to Christ (Galatians 3:24); and the Law is for sinners (1 Timothy 8-10).
So use the Law, talk of impending Judgment, and the penalty of Hell should anyone break just one commandment… and then stand back and watch as hardened atheists, touchy-feely tree-huggers, cult members, and even wishy-washy Christians pay attention.
They may even thank-you!