In Buddhist practice, it is said that while samatha meditation can calm the mind, only vipassanā meditation can reveal how the mind was disturbed to start with, which is what leads to insight knowledge (jñāna; Pāli ñāṇa) and understanding (prajñā Pāli paññā), and thus can lead to nirvāṇa (Pāli nibbāna). What is the term for understanding?