Six things that lead to final knowledge: 1. Considering the transience of all constructions, leads to final knowledge 2. Contemplating the pain within all transient states, leads to final knowledge 3. Comprehending the impersonality in all suffering, leads to final knowledge 4. Considering the advantage of withdrawal from all, leads to final knowledge 5. Contemplating the fading away of greed in disillusion, leads to final knowledge 6. Comprehending the freedom, bliss and peace within ceasing, leads to final knowledge (from Samyutta Nikaya 55.3)