energy is a term we use that describes the probability for some unit of matter to be in a different state at time T' than it was at time T. if you consider the

energy is a term we use that describes the probability for some unit of matter to be in a different state at time T' than it was at time T. if you consider the state to include position - relative to a frame of view - then energy describes (at least in part) the likelihood that the position at time T' is different than at time T