It means: only one person is upright, even if the shadow is skewed, don't be afraid. Usually used to describe that as long as people do things right and well, there is nothing to be afraid of. The truth of this sentence is: I am a man, aboveboard, and I don't do anything shady. Even if I gossip or frame your words and things outside, I will eventually collapse naturally.

"A straight body is not afraid of crooked shoes", and the second half sentence "A straight body is not afraid of crooked shoes" means that as long as one's feet are straight, one is not afraid of others saying that the shoes one wears are crooked. After all, there is no problem of its own. It also tells us that as long as what we do is right, we are not afraid of any unfavorable remarks.

We should keep ourselves upright, even if there are more people who speak ill of ourselves, we don't have to worry. After all, clean is clean.

There is a popular saying "Go your own way and let others talk". There are all kinds of people in Nuoda society, so there is no need to care too much, as long as we are decent.