<em>Three extremes:</em> substantial reality, the origin of substantial reality, and the cessation of substantial reality. <em>Three feelings:</em> pleasure, pain, and neutral. <em>Three forms of suffering:</em> the suffering inherent in painful feeling, the suffering inherent in conditions, and the suffering inherent in perishing. <em>Three heaps:</em> the heap of surety in the wrong way, the heap of surety in the right way, and the heap of lack of surety. <em>Three skillful roots:</em> <em>Thr