A dervish, darvesh, darwēsh, or darwīsh is a Muslim who seeks salvation through ascetic practices and meditations. It can refer to an individual or to a member of a Sufi order (tariqah). Their focus is on the universal values of love and service, deserting the illusions of ego (nafs) to reach God. This is usually done by performing a lifestyle which decreases bodily function to a minimum in order to attain what would be called "esoteric knowledge" in Western terminology. In most Sufi orders, a dervish is known to practice dhikr through physical exertions or religious practices to attain the ecstatic trance to reach God. Their most popular practice is Sama, which is associated with the 13th-century mystic Rumi.