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...we are simultaneously trying to pull others backward, putting hurdles in their way to hold them back, slow them down, hinder their progress - thinking that if we can stop them, we will have more opportunity for ourselves.
I think that most of them don't believe that they would have more opportunity for themselves if they stopped others. However, they believe that they will not be able achieve the success others have reached. Therefore, the more holding them back the more happy they are.
Jealousy is a powerful motivator.