There is a Persian story of Shirin and Farhad. Once Shirin, the girl whom Farhad admired, in order to test his love said, "Farhad, do you love me? If you love me, you will have to make a way through the mountains." Farhad said, "Yes, I was waiting for that test." He went to the mountains full of the feeling of love he had for her. Every time he broke the rock with his hammer, he said the name of Shirin, and the strength of his hammer became a thousand times greater because it was joined by the feeling of his heart.