Our precious, precious heart, the home of our spirit, our spirit the artery through which the unconditional Love of our Soul flows, into our flesh. When we say we are broken hearted, what we are saying is that our flow of Love from our Soul through our spirit into our body has been cut off or diminished. 

Your brain can think about Love and even think it believes in Love, but it is your heart, your spirits dwelling place, that feels Love and knows Love.

Be gentle if one has given you their precious heart, guard it as if it were the most the sacred of treasures, for to break a heart, is to break for a time the one who has gave connection to their Love, to their very Soul.
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"The best and most beautiful things in the world cannot be seen or even touched - they must be felt with the heart." ~ Helen Kelle