And worst of all is the person who acts as exegete of The Word -- whether it be from the Talmud, the Bible, the Koran, or any other book already written or yet to come. I am not fond of giving advice -- no one can pound opinions into another's head -- but here is a piece that costs you nothing: Never trust a man who reads only one book."
From "Purity of Blood" by Arturo Pérez-Reverte (volume two of the Alatriste series)
P.S. For those who were looking at the Alatriste movie trailer, I now know what's going on with the men fighting in water (thanks to v.2). A battle was fought between Moorish and Spanish troops in the Kerkennah Islands at the beginning of the 17th century; most of the fighting took place in the waist-deep waters of a shallow bay there.