The above is a wording of it that relates to harmful acts. Only a saint could go through life without ever harming another. But only a criminal hurts those around him without a second thought.
Murder is such an act.
One can work out how severe violation of almost any precept in this booklet could become an irreversible harmful act against another. The ruin of another's life can wreck one's own. The happiness and joy of life depart. When one persuades someone to apply it, the person can attain a reality on what a harmful act is . It answers for one what harm is.