Everyone endeavors as much as possible to make others love what he loves, and to hate what he hates... This effort to make everyone approve what we love or hate is in truth ambition, and so we see that each person by nature desires that other persons should live according to his way of thinking.
Baruch SpinozaIf anyone conceives, that an object of his love joins itself to another with closer bonds of friendship than he himself has attained to, he will be affected with hatred towards the loved object and with envy towards his rival.
Baruch SpinozaMen believe themselves to be free, simply because they are conscious of their actions, and unconscious of the causes whereby those actions are determined.
Baruch SpinozaSo long as a man imagines that he cannot do this or that, so long as he is determined not to do it; and consequently so long as it is impossible to him that he should do it.
Baruch Spinoza