Don’t Raise Your Voice to Me, Young Man

(Pro 16:21 KJV)  The wise in heart shall be called prudent: and the sweetness of the lips increaseth learning.

If you compare this verse with the NASB you find a different emphasis.  One seems to imply that moderate speech will make you a better teacher.  The other goes with the idea that it will make it easier for the listener.  As with so many places in scripture it is a matter of both.  

Harsh speech will often overshadow what you want to say.  The attitude will limit you as a teacher in trying to communicate.  It is also almost impossible for some to listen to words when all they hear is an angry attitude.

So?  It is a consistent point throughout the Bible.  Think of the beginning of the definition of love with patience and kindness.  Think of the Beatitudes with the meek inheriting the earth.  It is a sound principle for almost all of our relationships and interactions.  Moderation in everything except your love for the Lord.