Love, "the essence of the divine essence," is the most powerful force in creation. Coming from the dimension of the Self, love has a faster vibration than the mind and it has the ability to overcome the mind. We taste this in the experience of "falling in love" when we find that we cannot think clearly or rationally. When we give ourself in love to the Beloved this experience is amplified many times. In the words of 'Attâr, "When love comes reason disappears. Reason cannot live with the folly of love; love has nothing to do with human reason."
Rather than attempting to still one's thoughts by focusing on the mind, through focusing on the heart and the feeling of love within the heart one leaves the mind behind. Thought-forms slowly die and our emotions are also stilled. The "meditation of the heart" is a practice that drowns the mind and the emotions in love's ocean.