“And if this be madness in the multitude, it is the same in every particular man. For as in the midst of the sea, though a man perceive no sound of that part of the water next him, yet he is well assured that part contributes as much to the roaring of the sea as any other part of the same quantity: so also, though we perceive no great unquietness in one or two men, yet we may be well assured that their singular passions are parts of the seditious roaring of a troubled nation.”