You will earn respect from the people around you if you treat them the right way. Treat unkind people good too because they deserve it too.
If you want to be treated a certain way, display those qualities in yourself. If you want to be treated a certain way and you don't treat others like that, you won't be treated good then.
Even if you're trying to be a good person, you will get used to being treating like less. You will end up treating others how others treat you.
Everyone should be treated the same because nobody should be treated like they're not good enough. No one should be treated like they are less than they actually are because they'll eventually believe it.
In this poem, it says in the first paragraph it says "The littlest deeds go a long way." What it's saying is that people will be grateful for that tiny thing you did.
In the short story Goin Fishin, Lionel struggles to forgive his childhood friend Neal for the horrible accident even though he put his own friends at risk. The quote means that we have to be careful how we treat others because we never know how it will all turn out.