The heart is like a being which is asleep and receiving a sharp blow it awakens. Also the heart is like a stone and the fire which is hidden within it can only he brought to life when it is struck by a hard material. Then the fire appears. So it is with the heart. The fire which is life, love and feeling and which is the most sacred thing in us, is hidden in the heart as the fire in the stone. When it is struck hardly the fire appears. That is why we receive great blows in life. The person becomes thoughtful as soon as the fire appears. And he looks at things differently. But of life's changes and great blows the wise realize that joy, rest and peace come.