After Basini is humiliated and suspended upside down in the school gym because of one of Reiting's intrigues, Törless realises intellectually that the other boys are simply cruel. He seems no more or less emotionally moved by this than by the revelation that he cannot understand imaginary numbers. He decides that he does not want to partake in cruelty, so decides to leave the academy. His teachers think that he is too "highly strung" for his own good, and do not want him to stay anyway - they are part of the system which can allow such terrible things to be done to the weak and vulnerable.