Those who speak loudly, want to be heard. Those who merely speak directly, expect to be heard. How you voice yourself shows your confidence and strength of character- not just charismatic, but intellectual and otherwise personal.

One who speaks, wishes to talk.
One who shouts, will not listen.
Those who do not speak, are often listening.

And curses are linguistic hexes upon one's elocution.

He who swears, doth not care.

He who cares, will grow a pair.