He who has a true idea, knows at that same time that he has a true idea, nor can he doubt concerning the truth of the thing.
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 SpinozaHatred is increased by being reciprocated, and can on the other hand be destroyed by love.
Baruch Spinoza