Answer: It is important to "think before you speak", because what you say can effect you or others. Though you can say things to lighten up someone's day, you can also say something that could effect someone's day in a negative way. Sometimes you can even say something on accident that would negatively effect someone's day, or you could get consequences for your actions. Though you could have prevented these thing if you would have just thought about it before you spoke.
Explanation: This is all in my own words and I didn't "copy" anything so you will likely make a good grade on this question!