"The Four subjects not fit for speculative thought: 1. The specific qualities of a Buddha 2. A person\u2019s jhana attainment 3. The results of kamma 4. The nature of the world Anguttara Nikaya 4.77 (Speculating on these could lead one to mental distress and insanity.)"@en . "4 unfit subjects"@en . "The Four subjects not fit for speculative thought: 1. The specific qualities of a Buddha 2. A person\u2019s jhana attainment 3. The results of kamma 4. The nature of the world Anguttara Nikaya 4.77 (Speculating on these could lead one to mental distress and insanity.)"@en . .