2 volunteers were asked to come up and they were given 1 minute to empty a tube of toothpaste onto a paper plate. The toothpaste came out smoothly and quickly and it really only took 10 seconds.
Their spouses were then asked to come up and they were given 1 minute to put the toothpase back into the tube. It was messy, funny, and impossible.
We are like a tub of toothpaste, our words come out of our mouths quickly and smoothly, just like the toothpaste comes out of the tube. But trying to get those words back in our mouths is as impossible as it is to get the toothpaste back in the tube.
Be careful of what you say about other people, do not criticize others, or talk behind their backs because you can never take it back.