The answer is: Murder

Matt 5:21-22

In the Sermon on the Mount, Jesus takes the essence of the law and digs deeper into its intent, going beyond the mere actions prescribed in the commandments. In the case of anger, He sheds light on the idea that it's not just our outward behavior that matters; our internal emotions and attitudes hold weight too.

When Jesus spoke about being angry with a brother and equating it to murder, He rode the fine line of those old establishment rules, showing that the heart's condition is just as relevant as one's actions. This reflects an important theme in many spiritual traditions: the moral importance of intention. Instead of just a checklist to 'tick off' good behavior, these teachings challenge us to cultivate a respectful and loving mindset.

Reflecting back to the commandment about murder in Exodus, we see that God issued these laws to navigate human relationships. Under Jewish law, wrath could lead to a broken community – the same goes for our modern world! Anger and grievances, if nurtured, can escalate conflicts and spark division rather than unity.

Interestingly, echoes of this concept also appear in other texts, reinforcing that anger can be a seed from which great negativity grows. Cultivating mindfulness, patience, and forgiveness helps us combat not just personal frustrations but also broader societal rifts. Such practical wisdom still rings true today as we strive for harmony in our lives and communities.