hatred is also in your heart. You can't love and hate the same thing/person. You can hate the things they did but still love them. You can hate them, but love the memory of them
Well, Love fills your Heart.<br />
Whatever you are mad against, fuels your Hatred. <br />
Love and Hate go right to the core of one's being, the Heart.
Wherever that religious part of people's brains are. Of, it can also fill with love. More often than not it seems to fill with hate and shame though.
...a lack of love and the inability to see you're causing yourself your own misery...so you wallow in that hatred and boohoo yourself into feeling sorrier for yourself, perhaps even take on a 'woe is me' attitude, start looking and sounding like Eeyore...so you hate some more and on it goes...hate is very futile...
In ages past, they would have said your liver or your spleen.
Envy, regret, pain, suffering, the need to blame someone. Many things cause and fill hatred.