I will be polite and behave righteously towards that person.
Manners used in formal situations: correct bowing proceedures, sonkeigo, respecting heirarchy.
|お 辞儀 する||
a serious, formal bow - the real bow, not the head-nod.
|義||righteousness||NO LEFT RADICAL|
You discuss things when you SPEAK.
Righteousness is something you have inside you, but politeness is how you treat other PERSONs.
That's why righteous has no left radical ! It's an INTERNAL virtue.