I'm the first to admit that not every persuasion attempt you make will work out the way you want. But I'm here on your computer monitor to remind you to realize why some attempts succeed, to realize why some fail, and to realize the difference between the two. Within that difference resides your power of persuasion. If you become a better persuader, you become a better salesperson. If you become a better salesperson, you become a better marketer.
Guerrillas ask themselves questions after successful persuasions.
Frequently, failures are caused by persuaders failing to understand the person being persuaded. The deeper you amble into the head of your prospect, the more persuasive you will become because of the scope of your understanding. So now you know the truth. There is no magic in persuasion. There is simply research time and your own energy.