Words are the voice of the heart! The mouth speaks out of the abundance of the heart which means: MORE THAN NECESSARY!
“You snakes! How can you who are evil say anything good? For the mouth speaks what overflows from the heart. The good person brings forth good things from his store of good, and the evil person brings forth evil things from his store of evil. Moreover, I tell you this: on the Day of Judgment people will have to give account for every careless word they have spoken; for by your own words you will be acquitted, and by your own words you will be condemned.” Matthew 12:34-37 (JNT)