Simplify the following text for a Grade 8 native English-speaking person.
Original: Nakai later wrote his own , highly emotional , rebuttal to OgyÅ `` 's beliefs in his work Hi-Ch Å ( 1785 ) , wherein he rejected the idea that individuals could not better themselves through moral choices .
Simplified: Nakai later wrote his own , highly emotional , response to Sorai 's beliefs in his work Hi-Ch Å ( 1785 ) . In this work he rejected the idea that individuals could not improve themselves through moral choices .