You can't. Desire and aversion disappear "of their own accord" (to be overly simplistic) after you train your mind to be so focused that it can "see" desire and aversion coming. Normally we look at a...
it is its electrons, if an atom of an element is not stable which means its outershell is not full of electron is going to react more than an atom which has full shells... e.g.. take the noble gases...