Be kind to one another, Respect each other's differences, Stay away from violence or aggression towards others

This hadith explains that Allah will punish anyone who harms a believer, even if it is the inhabitants of the heavens and earth. It teaches us that we should never harm or hurt another believer as this is an unforgivable sin in Islam. We should always be kind to one another, no matter what our differences may be. We must remember that all believers are equal in God's eyes and harming one another goes against His teachings. This hadith also reminds us to stay away from any kind of violence or aggression towards others as this can lead to severe punishment from God Himself.