The Prince by Niccolo Machiavelli Chapter 19 Page 8

wherein we find an infinite number of wise institutions, upon which depend the freedom and the security of the King, and of which the most important are the Parliament and its authority. For he who gave its constitution to this Realm, knowing the ambition and arrogance of the nobles, and judging it necessary to bridle and restrain them, and on the other hand knowing the hatred, originating in fear, entertained against them by the commons, and desiring that they should be safe, was unwilling that the responsibility for this should rest on the King; and to relieve him of the ill-will which he might incur with the nobles by favouring the commons, or with the commons by favouring the nobles, appointed a third party to be arbitrator, who without committing the King, might depress the nobles and uphold the commons. Nor could there be any better, wiser, or surer