Please help me I still can't find two cause and effect relationships in the letter to his son by Robert e lee. I read the letter and have finish annotating it but still can't find it. Please help me

I have no idea what the reference is, but I've always taught students to look for the RESULTS of something (action, law, whatever), and then work backwards to figure out what made those results.

RESULTS = effects
what made results happen = causes