Alternative definitions of energy?

In summary, the conversation discusses different definitions of energy and work, and how they are related. The participants also share their own answers and opinions on how to redefine the term energy. One person suggests that energy is simply something that is always conserved in nature, while another brings up the relationship between work and kinetic energy. Ultimately, the conversation highlights the complexity and various interpretations of the concept of energy.
  • #141
Unfortunately I do not understand them now either.

Here is a quote from Maxwell that nicely sums up my question.

we are unable to conceive of propagation in time, except either as the flight of a material substance through space, or as the propagation of a condition of motion or stress in a medium already existing in space... If something is transmitted from one particle to another at a distance, what is its condition after it has left the one particle and before it has reached the other?
 

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