en_tn/pro/29/11.md

brings forth all his spirit

He has no self-control. He lets everyone know what he is thinking and feeling, especially when he is angry.

a wise man soothes it back

This line is not clear, but the idea is clearly that the wise man does the opposite of what the fool does: he quiets and holds back his anger and calms himself down so that he can control what he says and does.