<b>What three things make things worse?</b> Three unskillful roots: greed, hate, and delusion. <b>What three things lead to distinction?</b> Three skillful roots: contentment, love, and understanding. <b>What three things are hard to comprehend?</b> Three elements of escape. Renunciation is the escape from sensual pleasures. The formless is the escape from form. Cessation is the escape from whatever is created, conditioned, and dependently originated. <b>What three things should be produced?</b> Three knowledges: knowledge regarding the past portion, the future portion, and the present portion. <b>What three things should be directly known?</b> Three elements: the sensual realm, the realm of luminous form, and the formless realm. <b>What three things should be realized?</b> Three knowledges: recollection of past lives, knowledge of the death and rebirth of sentient beings, and knowledge of the ending of defilements. So these thirty things that are true, real, and accurate, not unreal, not otherwise were rightly understood by the Realized One.

4. Groups of Four