H.M.'s Govt. are deeply impressed with the conviction that it is wise for Sovereigns and their Governments to pursue in the administration of their a… - Henry Temple, 3rd Viscount Palmerston

My dear John Russell, Till lately I had strong confidence in the fair intentions of Napoleon towards England, but of late I have begun to feel great distrust and to suspect that his formerly declared intention of avenging Waterloo has only lain dormant and has not died away. He seems to have thought that he ought to lay his foundation by beating with our aid or with our concurrence, or our neutrality first Russia and then Austria: and by dealing with them generously to make them his friends and in any subsequent quarrel with us.

The hon. Member for Manchester (Mr. Bright) asks, "What is our interest in this war?" and he also asked me to explain the meaning of the expression "the balance of power." ...[The] "Balance of power" means only this—that a number of weaker States may unite to prevent a stronger one from acquiring a power which should be dangerous to them, and which should overthrow their independence, their liberty, and their freedom of action. It is the doctrine of self-preservation. It is the doctrine of self-defence, with the simple qualification that it is combined with sagacity and with forethought, and an endeavour to prevent imminent danger before it comes thundering at your doors.

[T]he object they [the Five Powers] have in view is to maintain the integrity of the Turkish Empire; and they have a right to maintain that integrity, because its maintenance is necessary for upholding the balance of power in Europe, and is essential to the preservation of peace in the world.