Simplify the following text for a Grade 12 native English-speaking person.
Original: The second point where Sorai disagreed with Song Confucianism was that he felt it was putting too much emphasis on morality and that it repressed human nature , because human nature was based on emotion .
Simplified: His second disagreement with Song Confucianism was that he felt putting too much emphasis on morality repressed human nature , which was based on human emotion .