<b>Three periods:</b> past, future, and present. <b>Three extremes:</b> substantial reality, the origin of substantial reality, and the cessation of substantial reality. <b>Three feelings:</b> pleasure, pain, and neutral. <b>Three forms of suffering:</b> the suffering inherent in painful feeling, the suffering inherent in conditions, and the suffering inherent in perishing. <b>Three heaps:</b> the heap of surety in the wrong way, the heap of surety in the right way, and the heap of lack of surety. <b>Three darknesses:</b> one is doubtful, uncertain, undecided, and lacking confidence about the past, future, and present. <b>Three things a Realized One need not hide:</b> The Realized One’s behavior by way of body, speech, and mind is pure. He has no misconduct in these three ways that need be hidden, thinking: ‘Don’t let others find this out about me!’ <b>Three possessions:</b> greed, hate, and delusion. <b>Three fires:</b> greed, hate, and delusion. <b>Another three fires:</b> a fire for those worthy of offerings dedicated to the gods, a fire for householders, and a fire for those worthy of a religious donation. <b>Threefold classification of the physical:</b> visible and resistant, invisible and resistant, and invisible and non-resistant.