Moshe Katz writes:
Have Faith in your Technique.
One of the principals in Krav Maga training is having faith in your technique, believing that it will work. If you are not sure about your technique, if you are not confident that it will work; you will not give it one hundred percent, you will hesitate and the technique will not be effective. This in turn will reinforce your lack of belief or confidence in the technique. You will become convinced that the technique is not effective. You must never let this happen.
For any technique to work, it must be executed with confidence and spirit.