The word 'heart' can refer to an emotional bond between people, and also to the precious faculty of empathy, an 'open heart', which means sharing the feelings of another and includes an outflow of goodwill towards our fellow humans and all life forms. This, of course, is what the Dalai Lama refers to when he says "my religion is kindness", and is closely related to the ability to feel compassion.
Eckhart Tolle