Answer:
I must always obey to my parents.
I mustn't steal anything from anyone.
I think it’s Cultural traits
The phrase, a decent respect for the opinions of mankind, was intended to convey a respect for what mankind thinks. Opinions are biases indulged by mankind inside their thought-matrices. Mankind is the species known as Homo Sapiens Sapiens.
Answer:
Happiness comes from believing in others.
They are thankful for the gifts but they don't know what to do with them because the gifts are either invisible or there are no gifts at all.