Hello Arnaud, sorry about that. For me : http://en.wikipedia.org/wiki/Guru , http://www.thefreedictionary.com/guru Guru : "a teacher and especially intellectual guide in matters of fundamental concern" [X] "one who is an acknowledged leader or chief proponent" [X] "a teacher or guide that you trust" [X] "a person who has a lot of experience in or knowledge about a particular subject " [X] [X] Thats what I trying to say.... Sorry, post edited. Carlos