The sentence "Words have power" indicates that all words have power. If all words have power, anyone can talk their way or write their way into or out of anything. The vast majority of people will someday find out that they can't, if they haven't already found out. (There are a very, very small number of people who really can talk/write their way into or out of anything, such as hotshot celebrities, heads of states, Fortune 500 CEOs, chart-topping singers and best-selling authors.) You shouldn't believe everything you hear or read, and you can't expect everyone to believe everything you say or write.