Or take an instance from the student's childhood: His parents made him take...

Or take an instance from the student's childhood: His parents made him take violin lessons. He was not very gifted and his teacher would interrupt him to criticize his mistakes in a cold, unbearable voice. He felt humiliated, and he wanted to cry. But instead of trying to play in tune and not make mistakes, he would deliberately play wrong notes, the teacher's voice would become still more unbearable and harsh, and he himself would sink deeper and deeper into his litost.
What then is litost?
Litost is a state of torment created by the sudden sight of one's own misery.