Physics takes as postulates the following.
1. There is energy of a particle, T, associated with its motion, called kinetic.
2. There is energy of a system of particles, U, associated with interactions among them, called potential.
3. Whenever a system of particles evolves, it does so in a way that make the total vaiation of the quantity (T-U) minimal (this is Hamilton's Principle of Least Action).
Conceptually, that's it. In applications, one has to exhibit the form of the potential energy U, which is system-specific, of course. There is no empirical evidence at odds with this structure.
Which part of it qualifies as nonsense?
Lunch break, errand running... But I see we have much to discuss. I will try to post a more complete explanation later
Lafroste