"Your thoughts, your feelings, your emotions, your sentiments, all are centered in your head. It is just a fallacy to think that your feelings are in the heart. Your heart is just a blood pumping station.
"When we are talking about the empty heart, we are really talking about the empty mind. Buddha has used the word heart instead of mind because mind has become associated with the idea that it is only the process of thinking, and the process of feeling is in the heart, and the heart is deeper.
"These ideas have been created by the poets. But the truth is, you can call it empty mind or you can call it empty heart; it is the same. Emptiness – you are just a watcher and all around there is nothing with which you are identified, there is nothing to which you are clinging. This non-clinging watchfulness is the empty mind, no-mind, or empty heart. These are simply words. The real thing is emptiness – of all thoughts, feelings, sentiments, emotions. Only a single point of witnessing remains."
Osho, The Buddha: The Emptiness of the Heart, Talk #8