River

A river is a natural watercourse, usually freshwater, flowing towards an ocean, a lake, a sea, or another river. In a few cases, a river simply flows into the ground or dries up completely before reaching another body of water. Lethe, the river of forgetfulness, was one of the five rivers of the Greek underworld, the other four being Styx (the river of hate), Akheron (the river of sorrow), Kokytos (the river of lamentation) and Phlegethon (the river of fire). According to Statius, it bordered Elysium, the final resting place of the virtuous. Ovid wrote that the river flowed through the cave of Hypnos, god of sleep, where its murmuring would induce drowsiness. The shades of the dead were required to drink the waters of the Lethe in order to forget their earthly life. In the Aeneid, Virgil writes that it is only when the dead have had their memories erased by the Lethe that they may be reincarnated.