"Once those words leave your mouths, you'll be never able to take them back. Words like swords. If you use them the wrong way, they'll turn into ugly weapons. There are cases of broken friendship that could that lasted a lifetime if not for verbal abuse. Once you server your ties, you might not see each other ever again." -Edogawa Conan

"Whoever would love life
    and see good days
must keep their tongue from evil
    and their lips from deceitful speech."
1 Peter 3:10 NIV