A British biologist put a jay's egg in a red-tailed robin's nest and let it hatch there. It is an experiment performed to test hearing ability. The baby jay had heard the red-tailed robin's sound since before it hatched and it imitated the sound of the red-tailed robin. Even though it was later placed together with other jays that are of its own species, it still made the sound of the red-tailed robin. In the same manner, people can change according to what kind of words they usually hear. We have to understand that words can change our hearts, thoughts, and deeds and pay attention to words of goodness always.
"An evildoer listens to wicked lips; a liar pays attention to a destructive tongue" (Proverbs 17:4).