Not that I have already obtained this or have already reached the goal; but I press on to make it my own, because Christ Jesus has made me his own. Beloved, I do not consider that I have made it my own; but this one thing I do: forgetting what lies behind and straining forward to what lies ahead, I press on toward the goal for the prize of the heavenly call of God in Christ Jesus. (Philippians 3.12-14)
I originally wrote this as part of a training manual for how to integrate physical training with the rest of our lives. But I realized this section deals with ideas and practices that will help us attain excellence in any part of our lives. Because most of us want to be the best version of ourselves. But we often lack the tools to develop goals and plans to help us get there. And "failing to plan is planning to fail". To attain our best self, our strongest self, and our wisest self, we have to intend to become this, imagine what it might look like to be this, and plan the best way to get from where we are, to where we want to be. The material found here is helpful for this. And although most of the examples used here come from physical training, the underlying substance applies to becoming great in any endeavor.