The meaning of representative government is, that the whole people, or some numerous portion of them, exercise through deputies periodically elected by themselves the ultimate controlling power, which, in every constitution, must reside somewhere. This ultimate power they must possess in all its completeness. They must be masters, whenever they please, of all the operations of government. There is no need that the constitutional law should itself give them this mastery. It does not in the British Constitution. But what it does give practically amounts to this: the power of final control is as essentially single, in a mixed and balanced government, as in a pure monarchy or democracy. This is the portion of truth in the opinion of the ancients, revived by great authorities in our own time, that a balanced constitution is impossible. There is almost always a balance, but the scales never hang exactly even. Which of them preponderates is not always apparent on the face of the political institutions. In the British Constitution, each of the three co-ordinate members of the sovereignty is invested with powers which, if fully exercised, would enable it to stop all the machinery of government. Nominally, therefore, each is invested with equal power of thwarting and obstructing the others; and if, by exerting that power, any of the three could hope to better its position, the ordinary course of human affairs forbids us to doubt that the power would be exercised. There can be no question that the full powers of each would be employed defensively if it found itself assailed by one or both of the others. What, then, prevents the same powers from being exerted aggressively? The unwritten maxims of the Constitution--in other words, the positive political morality of the country; and this positive political morality is what we must look to if we would know in whom the really supreme power in the Constitution resides. By constitutional law, the crown can refuse its assent to any act of Parliament, and can appoint to office and maintain in it any minister, in opposition to the remonstrances of Parliament. But the constitutional morality of the country nullifies these powers, preventing them from being ever used; and, by requiring that the head of the administration should always be virtually appointed by the House of Commons, makes that body the real sovereign of the state.