In the midst of a perturbed flux of dynasties, usually short lived, often alien, only occasionally commanding the affection and respect of the population, the Brahmans have maintained for at least two millenniums and a half their predominant position as an intellectual aristocracy. They are an aristocracy, for they boldly profess to be by birth better than other men. Although it is probable that many clans have entered the privileged order without genealogical warrant, yet in all cases birth is claimed[126]. And though the Brahmans have aristocratic faults, such as unreasonable pride of birth, still throughout their long history they have produced in every age men of intelligence, learning and true piety, in numbers sufficient to make their claims to superiority seem reasonable. In all ages they have been sensual, ambitious and avaricious, but in all ages penetrated by the conviction that desire is a plague and gratification unsatisfying. It is the intelligent sensualist and politician who are bound to learn that passion and office are vanity. A Brahman is not necessarily a priest. Although they have continually and on the whole successfully claimed a monopoly of sacred science, yet at the present day many follow secular callings and probably this was so in early periods. And though many rites can be performed by Brahmans only, yet by a distinction which it is difficult for Europeans to grasp, the priests of temples are not necessarily and, in many places, not usually Brahmans. The reason perhaps is that the easy and superstitious worship offered in temples is considered trivial and almost degrading in comparison with the elaborate ceremonial and subtle speculation which ought to occupy a Brahman's life.