Buddhism stresses the law of mutual causation of all actions: this means that when something happens, rules are made according to the incident, not before it happens. Therefore, today, when looking at religious canons we should also think back to the intentions at the time they were made.
佛教講的是因緣法：所謂因緣法就是現實中發生什麼事了，再依事件來定規則，而不預設條文，因此今天看待戒律也應追溯當初制訂的本意。