I think that if you generally practice getting outside of your self-centered default setting, and practice looking at situations from an outside perspective, yo

I think that if you generally practice getting outside of your self-centered default setting, and practice looking at situations from an outside perspective, you almost immediately start practicing viewing situations from other people's point of view. I think that very quickly leads to the realization that a foundational aspect of life is how we all care for one another, and how you can do so as well. I think DFW recognizes this, and hopes that the people listening to this speech ultimately come to this same conclusion on their own, amongst many other that such a mindset can reveal over time. And I think that bleeds through his works, this one included. Lastly, I agree with you, that that sentence holds an important truth. The heart of all moral philosophy is about the question of what we owe each other. It is a genuinely valuable disposition to keep in mind.