Training (human development) is like plotting points on a curve, right? So, where are you on the curve? Where is your process and the athletes you work with? Are you more on the side of the curve plotted with "fixed" training and beliefs, i.e., there's only one way to train? Or, are you more on the side of the curve plotted towards "continual growth" i.e., a growth mindset?
One individual that I really enjoy listening to is Stanford University psychology professor, Dr. Carol Dweck. Her work into The Growth Mindset has huge implications for helping athletes to develop over a continuum. I think this talk is much worth the time: