Plutarch, Quaestiones Romanae
Goodwin, Ed.

Solution. What if the tribune is not a magistrate at all? For he neither hath lictors, nor sitting in tribunal doth he determine causes; neither do the tribunes, as the rest, enter upon their office at the beginning of the year, [p. 247] nor do they cease when a dictator is chosen; but as if they translated all magistratic power to themselves, they continue still, being (as it were) no magistrates, but holding another kind of rank. And as some rhetoricians will not have a prohibition to be judicial proceeding, seeing it doth something contrary to judicial proceeding,—for the one brings in an action at law and gives judgment upon it, but the other nonsuits it and dismisseth the cause,— after the like manner they are of opinion that tribuneship is rather a curb to magistracy, and that it is an order standing in opposition to government rather than a piece of government itself; for the tribune's office and authority is to withstand the magistrate's authority, even to curtail his extravagant power. Perhaps these and similar reasons may be mere ingenious devices; but in truth, since tribuneship takes its original from the people, popularity is its stronghold, and it is a great thing not to carry it above the rest of the people, but to be like the citizens they have to do with in gesture, habit, and diet. State indeed becomes a consul and a praetor; but as for a tribune (as Caius Curio saith), he must be one that even is trampled upon, not grave in countenance, nor difficult of access, nor harsh to the rabble, but more tractable to them than to others. Hence it was decreed that the tribune's doors should not be shut, but be open night and day as a haven and place of refuge for distressed people. And the more condescending his outward deportment is, by so much the more doth he increase in his power; for they dignify him as one of public use, and to be resorted to of all sorts even as an altar; therefore by the reverence they give him, he is sacred, holy, and inviolable; and when he makes a public progress, it is a law that every one should cleanse and purify the body as defiled.