But political philosophy must analyse political history; it must distinguish what is due to the excellence of the people, and what to the excellence of the laws; it must carefully calculate the exact effect of each part of the Constitution, though thus it may destroy many an idol of the multitude, and detect the secret of utility where but few imagined it to lie.

How important singleness and unity are in political action no one, I imagine, can doubt. We may distinguish and define its parts; but policy is a unit and a whole. It acts by laws⁠—by administrators; it requires now one, now the other; unless it can easily move both it will be impeded soon; unless it has an absolute command of both its work will be imperfect. The interlaced character of human affairs requires a single determining energy; a distinct force for each artificial compartment will make but a motley patchwork, if it live long enough to make anything. The excellence of the British Constitution is that it has achieved this unity; that in it the sovereign power is single, possible, and good.