For centuries the heart was the center of the soul, the life, the passion of an individual.
Even after science has found that the heart is simply a pump and that the brain is the center of consciousness and all emotion. I think that I understand why we continue to have the heart the center of love and passion. I had a broken heart once. Only once so I guess I can consider myself lucky. But I remember it to this day. The pain was physical; even more so that emotional. Along with the tears was the searing pain in the center of the left chest -precisely in the heart.
A broken heart was the best description. I recovered. I may have forgotten the person but not the pain.
But life goes on and I still have a passion for the life I have. And I think that centers in my heart also even though it starts in my brain.