"Represent the transgression of the law because it exceeds of one the number of ten, which is the one of the Decalogue. For this fact, it represents the sin according to saint Augustin. The psalm 11 (Vulgate numbering) asks effectively the punishment of the wicked. The theoretical speculations on this number confirm this symbolism. The sum of numbers 1 to 11 is 66, which multiplying eleven by the number symbol of the evil, the diabolic 6; by the addition of the two digits which compose it as by its reading in Roman number, II, it reminds the 2, number of the division and the corruption." -- http://www.ridingthebeast.com/numbers/nu11.php