4 unfit subjects

The Four subjects not fit for speculative thought:
1. The specific qualities of a Buddha
2. A person's 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.)
==References==
*The Complete Book of Buddha's Lists -- Explained. David N. Snyder, Ph.D., 2006.
*http://www.thedhamma.com/
Category:Buddha's Lists