いかにも敬虔なるクリスチャンが送る、礼節重き言葉です。

tbd

So characteristic of what a pious Christian would say, this courteous phrase.

恩人に礼節を欠いてはなりませんよ。

tbd

You must not lack decorum dealing with your benefactors.

衣食足りて礼節を知る。

tbd

It is hard for an empty sack to stand straight.