We comprehend the world through everyday full real life actions. The truth for us is how our lives involve the universe. To develop our comprehension we need to bring more of our immediate experiences into how we access realities of the world
Energies interchanges of the universe include all human life actions so we have to find some realities functions operations that represent what the universe is for us.If we want to understand gravity we have to find something in our own experience that makes sense of a universal energy exchange.
Energies interchanges of the whole universe provide a reality function for gravity so that what we sense and know about the interactions of masses that we call gravity is a feature of energies realities functions of the whole universe.
We know that gravitation is universal we can now identify energy exchange function from our own experience that makes sense and enables us to comprehend gravitational interactions on the scale of galaxies.