Antigen: An antigen is any substance that causes your immune system to produce antibodies against it. This means your immune system does not recognize the substance, and is trying to fight it off. Such as chemicals, bacteria, viruses, or pollen. Antibodies: On the other hand, antibodies bind to foreign substances, such as bacteria and viruses, and cause them to be destroyed. Spiritually, sin in like the Antigen, it attacks the body of Christ, that is the members of the church, and the only weapon we have is the word of God. When we study and learn the word we become Antibodies that destroy sin in every crevice of our life. This lesson and subsequent lesson will help us to understand how to be spiritually well.