Scientia potentia est phrase ""sapientia est potentia"" is often translated as "wisdom is power". The earliest documented occurrence of the phrase "Knowledge is power" is from Imam Ali (599-661 CE), as recorded in the tenth-century book Nahj Al-Balagha (originally in Arabic). He said: Another account of this concept is found in the Shahnameh by the Persian poet Ferdowsi (940–1020 CE) who wrote: "Capable is he who is wise" (in Persian: توانا بود هر که دانا بود). This hemistich is translated to English as "knowledge is power" or "One who has wisdom is powerful". A proverb in practically the same wording is found in
Diana Est in Italian and partly in Latin. In 1983, she got her main hit with the song "Le Louvre", still written by Ruggeri. Following a further single, and once her contract with Ricordi expired, Est abruptly decided to quit showbusiness in the mid-1980s. In 2002, the novelist wrote a short story, "Magnifica ossessione" (i.e. "Magnificent obsession") about the imaginary life of Est after her retirement. Barbieri is the niece of singer-songwriter Mario Lavezzi. Diana Est Cristina Barbieri (born 12 June 1963), best known as Diana Est, is an Italian singer who retired in the mid-1980s. Born in Milan, Barbieri started her