The heart is just the heart; thoughts and feelings are just thoughts and feelings. Let things be just as they are.
Ajahn ChahTo observe and watch one's own mind is something really interesting. The untrained mind will run and follow its old habit patterns. Because it has not been trained and taught, it will get lost in all kinds of stories and issues. Therefore we have to train our mind. The meditation practice in Buddhism is all about training one's own mind.
Ajahn Chah