Stupid question, but lately it's been bugging me. When and why did the usage of heart come to infer more than the organ's real purpose? As in, "I just feel it in my heart..." "She broke my heart," and "Special place in my heart." I know it's used in the Bible like this, so it at least goes back to the Romans. Lately, it infuriates me when people use this phrase, and I know it shouldn't. I'd just like to know where it came from.