Views on drugs, esp. natural or herbal ones such as cannabis, vary widely between the various Buddhist sects, which can be summarized into Theravada Buddhism, Mahayana Buddhism and Vajrayana Buddhism. The Theravada tradition keeps the Fifth Precept for laypeople more seriously, as well as literally according to the words of the phrasing, i.e. "I vow to abstain from fermented drinks" (Pali: "Surāmerayamajjapamādaṭṭhānā veramaṇī sikkhāpadaṃ samādiyāmi"), and tends to be more anti-alcohol and anti-drug in general than the other Buddhist traditions. In Mahayana Buddhism, the (specifically Mahayana) Bodhisattva Precepts override the Vinaya Precepts (or pratimoksha vows), which it shares in common with the Theravada but emphasizes less. The main thrust of the Bodhisattva ethical code is that anything which is beneficial for oneself and others should be adopted, while anything harmful to oneself and others should be avoided. This obviously leaves more room for medical interpretations of cannabis. Vajrayana Buddhism is probably the most open to cannabis use, esp. in the sense that the Vajrayana Precepts urge the aspirant to develop "pure view", in which one extracts the pure essence of all things through seeing their true nature of śūnyatā, including things normally seen as defiled such as sex and, as mentioned in some Tantric Buddhist texts, drugs including cannabis. Moreover herbal medicine, including some natural psychoactive drugs, is deeply linked with the Tantric Buddhist traditions of Vajrayana, in particular Tibetan Buddhism. Although the Vajrayana traditions also maintain the Vinaya and Bodhisattva Precepts, the Tantric Precepts or "samaya", which reflect Vajrayana doctrine, are held to be paramount.