Satan blurs the reality of sin. He may even convince people what God calls sin in the Bible, is not really a sin. He does this by changing the words our society uses to describe sin, or remove all together the ideas that something is a sin. He also causes our society to take the responsibility for sin and push it onto others, or even label specific sins a “disorder”. A few examples are alcoholism or drug addiction, which God said not to do, is now called a disease. Homosexuality or sodomy is now called alternative lifestyle. Fear, doubt, worry, and anxiety are now called panic disorder or bi-polar disorder or depression. Adultery is now called having an affair or experimentation. Be aware of word changes, or labels that mask what God calls sin. Be aware society today even glorifies what is an abomination to God. Isaiah 5:20 says woe to people who do that, and we need to stand firm with God on what He calls sin.
Teach what sin is to your students including the origin of sin in Genesis 3, the penalty of sin, the fact we all sin, the need for repentance and why, and that Jesus has taken away the penalty of sin if the person repents and believes Jesus did. What is sin? Sin is a transgression against God or one of His laws.
When John Wesley went to college, his mother wrote a letter to him with a definition of sin: “Take this rule: whatever weakens your reason, impairs the tenderness of your conscience, obscures your sense of God, or takes off your relish of spiritual things; in short, whatever increases the strength and authority of your body over your mind, that thing is sin to you, however innocent it may be in itself.” – Susanna Wesley June 8, 1725