Mawlana Rumi,the great poet of Persia, says :
The pains and sorrows, the soul experiences through life are like
holes made in a reed flute, and it is by making these holes that a
player makes the flute out of a reed.
This means that the heart of man is first a reed and the sufferings and
pains it goes through make it a flute which can then be used by God as
the instrument for the music that He constantly wishes to produce.
But as every reed is not a flute, so every heart is not His instrument.