That's true but we are all just human beings and sometimes say things we don't mean. It is one of the most difficult things to learn, to think twice before you say anything especially when the words are result of your emotions, either you're born that way either you learn it over the years.
Boet: A single word spoken in anger, can undo all and any words ever uttered in compassion and love. Likewise, a single word spoken out of love, can assuage all words spoken in anger. It just requires so much more conviction to trust again