It's important to realize that we are constantly taking in information through a "filter." We are making our best attempts to piece together billions of small bits of information and creating a distorted "best attempt." We need to be AWARE of that fact.
Progress comes with adaptation. Adaptation is quite often painful and uncomfortable, mentally and physically! Correcting movement, lifestyle habits, and increasing training volume all aid in the progress clients are looking for, but dialing in mindset will lead to harder work ethic and improved behaviors OUTSIDE the gym. The correct mindset will help change the perception of pain and the uncomfortable feelings that come with change and lead your clients down the path of progress.