There was a young man named Srona who was born in a wealthy family but was of delicate health. He was very earnest to gain Enlightenment and became a disciple of the Blessed One. On the path to Enlightenment, he tried so hard that finally his feet bled.
The Blessed One pitied him and said, "Srona my boy, did you ever study the harp at your home? You know that a harp does not make music if the strings are stretched too tight or too loose. It makes music only when the strings are stretched just right.
"The training for Enlightenment is just like adjusting the harp strings. You can not attain Enlightenment if you stretch the strings of your mind too loosely or too tightly. You must be considerate and act wisely."
Srona found these words very profitable and finally gained what he sought.