This domestic Spiritual Power, being principally moral, and confined to a private life, requires the support and guidance of an intellectual power exterior to it, the sphere of which will naturally be wider, extending also to public life. This consists of the clergy, or priesthood, for M. Comte is fond of borrowing the consecrated expressions of Catholicism to denote the nearest equivalents which his own system affords. The clergy are the theoretic or philosophical class, and are supported by an endowment from the State, voted periodically, but administered by themselves. Like women, they are to be excluded from all riches, and from all participation in power (except the absolute power of each over his own household). They are neither to inherit, nor to receive emolument from any of their functions, or from their writings or teachings of any description, but are to live solely on their small salaries. This M. Comte deems necessary to the complete disinterestedness of their counsel. To have the confidence of the masses, they must, like the masses, be poor. Their exclusion from political and from all other practical occupations is indispensable for the same reason, and for others equally peremptory. Those occupations are, he contends, incompatible with the habits of mind necessary to philosophers. A practical position, either private or public, chains the mind to specialities and details, while a philosopher's business is with general truths and connected views (vues d'ensemble). These, again, require an habitual abstraction from details, which unfits the mind for judging well and rapidly of individual cases. The same person cannot be both a good theorist and a good practitioner or ruler, though practitioners and rulers ought to have a solid theoretic education. The two kinds of function must be absolutely exclusive of one another: to attempt them both, is inconsistent with fitness for either. But as men may mistake their vocation, up to the age of thirty-five they are allowed to change their career.