Alma 8:31

31 And they had power given unto them, insomuch that they could not be confined in dungeons; neither was it possible that any man could slay them; nevertheless they did not exercise their power until they were bound in bands and cast into prison. Now, this was done that the Lord might show forth his power in them.

I don't know where to begin with all the wondering this verse invites.

But I love that Alma and Amulek exercised (showed) God's power not for themselves, to save their physical lives, but for the people - so God could save their spiritual lives.

Feasting on these thought provoking words.