Want to try an experiment? Grab a tube of toothpaste and squeeze some out onto a plate. Now try putting all that toothpaste back inside the tube. So, can you do it? You can't, right?
Our words are just like that: once we say them, there's no putting them back. That's why it's so important to think before you speak. Words can be like medicine, which helps and heals, like a compliment, a thank you, or an I love you, or they can be like a punch, which hurts, like a mean name, a lie, or teasing.
The Bible says that whoever takes care of what they say is taking care of their own life. Before letting a word out, you can ask yourself: is this true? is this kind? will this help or hurt? And when we ask Jesus to take care of our heart, it gets easier for good things to come out of our mouth.
A spoken word doesn't go back in, just like toothpaste. Think before you speak.