(Proverbs 29:11 KJV) A fool uttereth all his mind: but a wise man keepeth it in till afterwards.
A key word here is the “always” of the NASB which I assume is the same as the “all” (3605) of the KJV. There are probably times to let it all hang out. Strong expression has its place. The problem we have is that some people feel like they always have the right to verbal excess. The other problem is that some of us don’t have a very good gauge of when is the right time.
So? A general rule that seems to come out in Proverbs is, “Don’t”. Control your temper. Say less. Take the hit without retaliation. We don’t like it but there it is.