Final answer:
The Stripling Warriors are an example of faith, courage, obedience, and disciplined behavior, proving that these virtues can bring success even in challenging circumstances.
Step-by-step explanation:
The lesson learned from the Stripling Warriors in Alma 57:21 from the Book of Mormon emphasizes the virtues of faith, courage, and obedience. The Stripling Warriors were a group of young men who fought with remarkable bravery and were preserved because of their faith and the faith of their mothers. They also exemplified great discipline and integrity, which contributed to their success on the battlefield.
These narratives can teach various moral lessons applicable for personal development. For instance, the Stripling Warriors highlight the principle that faith and moral conviction can provide strength in adversity. Moreover, it shows the importance of receiving guidance and then implementing it through discipline.