parts of it, mainly the doctrine of rebirth, as residual superstitions. Zazen The aim of zazen is just sitting, that is, suspending all judgmental thinking and letting words, ideas, images and thoughts pass by without getting involved in them. Contemporary Vipassana-meditation In modern vipassana-meditation, as propagated by the Vipassana movement, sati aids vipassana, insight into the true nature of reality, namely the three marks of existence, the impermanence of and the suffering of every conditioned thing that exists, and non-self. With this insight, the practitioner becomes a so-called Sotāpanna, a "stream-enterer", the first stage on the path to liberation. Vipassana is practiced in tandem with Samatha, and also plays a central role in other Buddhist traditions. According to the contemporary Theravada orthodoxy, Samatha is used as a preparation for Vipassanā, pacifying the mind and strengthening the concentration in order to allow the work of insight, which leads to liberation. Vipassanā-meditation has gained popularity in the west through the modern Buddhist vipassana movement, modeled after Theravāda Buddhism meditation practices, which employs vipassanā and ānāpāna meditation as its primary techniques and places emphasis on the teachings of the Sutta. Anapanasati, satipaṭṭhāna, and vipassana Anapanasati is mindfulness of breathing. "Sati" means mindfulness; "ānāpāna" refers to inhalation and exhalation. Anapanasati means to feel the sensations caused by the movements of the breath in the body. The Anapanasati Sutta gives an exposition on this practice. Satipaṭṭhāna is the establishment of mindfulness in one's day-to-day life, maintaining as much as possible a calm awareness of one's body, feelings, mind, and dhammas. The practice of mindfulness supports analysis resulting in the arising of wisdom (Pali: paññā, Sanskrit: prajñā). Samprajaña, apramāda and atappa In contemporary Theravada practice, "mindfulness" also includes samprajaña, meaning "clear comprehension" and apramāda meaning "vigilance". All three terms are sometimes (confusingly) translated as "mindfulness", but they all have specific shades of meaning. In a publicly available correspondence between Bhikkhu Bodhi and B. Alan Wallace, Bodhi has described Ven. Nyanaponika Thera's views on "right mindfulness" and sampajañña as follows: Monitoring mental processes According to Buddhadasa, the aim of mindfulness is to stop the arising of disturbing thoughts and emotions, which arise from sense-contact. According to Grzegorz Polak, the four upassanā (foundations of mindfulness) have been misunderstood by the developing Buddhist tradition, including Theravada, to refer to four different foundations. According to Polak, the four upassanā do not refer to four different foundations, but to the awareness