Proverbs 9:14 “Wise men store up knowledge, but the mouth of a fool invites ruin.” Thinking about the effects of what one has to say before speaking is the trait of a wise person.  Listening carefully and understanding what is being said before responding is also a sign of a wise person.  Listen, learn and gain knowledge are all traits of a wise person.  Be careful to never fall into the trap of the second half of this passage.