A trainer's true job is to get the long-term performance of the students to as high a level as possible with the tools they are training with, and at the same time get each trainee to believe he or she is a winner. Simply put, whatever tools and training you receive are ultimately only as good as your belief about yourself. If you believe you’re a winner you will find a way to win with whatever tools you have, and if you believe you're a loser, you will find a way to lose no matter how good your tools are.
The greatest trainers are the ones who realize training is not just about "teaching a brain how to remember a skill," but also "creating belief in the result that skill brings," the future the skill creates. One of the toughest things for me to convince cadets was that it was OK for good people to kill bad people to protect their lives or the lives of other innocents. We will never know how many of our brothers and sisters failed to win armed assaults, regardless of the quality of their weapons, because in their hearts and unconscious minds they didn’t have the belief in their right and duty to defend their lives by taking the lives of others.
I know we don't shoot to kill, we shoot to stop threats. But it just so happens that, if we do that well, bad guys often die. We have to be able to win without hesitation, whether due to administrative concerns or moral ones.
A good trainer develops the skill and the mind together. "The Book of Five Rings" by Miyamoto Musashi is supposed to be a book about sword fighting, but the last part of the book, the "Book of Void," is about mindset. Musashi says we should fight with "virtue and no evil." Damn good advice centuries later and something we all need to follow.
Whether or not you are a trainer for others, you are responsible for training yourself. Prepare yourself to win. And while you may or may not have one of the cool weapons I was shooting the other day, it is important to train with the weapons and tools you do have and to develop the mindset to use them to do one primary thing … win.