I've had as hard a time with the concept of the heart as I've had with the concept of the soul. Currently I am thinking the heart is a reference to what your goals are and what you direct your attention to. However, I am not sure.
What does the Bible mean when it refers to the word "heart"? Did they only use it in the sense of a four-chambered organ that circulates blood throughout the body, or did they use it in other ways? How do emotions relate to it? How do thoughts relate to it? What other insight does the scripture provide with respect to the heart?