Like Napoleon said;
"Think twice before you speak, because your words and influence will plant the seed of either success or failure in the mind of another."Just remember, once words have left your tongue, they cannot be taken back. It is said that two things cannot be taken back. One is words when they leave the tongue of a person and the other is arrow when it leaves a bow.
You see like an arrow, it will take you just a minute to target and shoot but the wound created by it will take weeks or days depending on where and how hard it hit. Saying things is very easy but the mess created by it is very hard to clean. And sometimes it just cannot be cleaned.
My mother always says that a person looks best till he or she speaks. After that, either they will continue looking best or will look their worst. So how you speak and what you speak is what defines who you are. It makes up your personality and whatever you say will tell the other person what you are made up of. Judgement is based on the way people speak. Its like if someone has an accent, you know whether they are from a town or a village. Similarly, what you speak will tell the other person whether you belong to a good family or not.
At the end of the day, words matter a lot. How they should be spoken, when they should be spoken and what should be spoken. Think before you speak because it comes down to this.