Is Mass Really the Opposite of Energy?

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To what extent is fair to say that mass is anti-energy or the opposite of energy?

Energy makes "things" move
Mass makes "things" resist movement

I have always had trouble understanding energy, mostly because it is not located in a particle, rather it is some abstract description of objects and what objects have. I'm starting to think that mass is equally abstract.

category justification: I put this in the high energy section since it deals with energy and mass.
 
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To what extent is fair to say that mass is anti-energy or the opposite of energy?

This looks to me like wordplay not physics.
 
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