we are all fickle that way : one day , our spirits are generous and we will sacrifice anything of ourselvesour lives evento please the object of our affections , but in the next moment , we revert to our most vicious instincts of survivalism , seeking to destroy the ego of this newfound object of enmity , possibly because of some betrayal , or possibly because we sense that this person has become a threat to our livelihood , thus propelling us to seek the most effective solution in minimizing damage to ourselves .