To perform at your best, you must own your actions. You must be fully responsible for what you do and accept the effects you create 100%. Any advice from others is only as good as you own them yourself. Any method, methodology, system of belief or guidance will only help you if you can fully own them. And to own an advice or method from another, you must prove its effectiveness by your own senses. Anything less will disparage your responsibility – your ability to perform will suffer to that degree because you will be less yourself.
Be careful when you accept an advice or adhere to a method. Take care to make it your own before you start to truly rely on them for your performance.