Rumi gives a good explanation of this in his Masnavi where he says, "What is it in the reed flute that appeals to your soul, that goes through you, pierces the heart?" And the answer is: it is the crying of the flute, and the reason of its crying is that it once belonged to a plant from which it was cut apart. Holes were made in its heart. It longs to be reunited with its source, with its origin. In another place in his book Rumi says, "So it is with everyone who has left his original country for a long time; he may roam about and feel very pleased with what he sees, but there will come a moment when a strong yearning rises in his heart for the place where he was born.'