1 Nephi 3:29

Angels won't always protect us from harm, but they are always looking out for us.
Do not react harshly, rashly, with anger.
Anger only hurts it does not help.

"And it came to pass as they smote us with a rod, behold, an angel of the Lord came and stood before them, and he spake unto them, saying: Why do ye smite your younger brother with a rod? Know ye not that the Lord hath chosen him to be a ruler over you, and this because of your iniquities?"

Nephi's story is similar to Joseph of Egypt's story.