I am more and more convinced that man is a dangerous creature and that power, whether vested in many or a few, is ever grasping, and like the grave, cries, ’Give, give.’

The quote is a compact argument for constitutional skepticism: the danger lies less in a particular ruler than in the human impulse to accumulate control. By insisting that power is “ever grasping,” Adams anticipates a core principle of republican political thought—ambition must be made to counteract ambition, and institutions must assume fallibility. The comparison to “the grave” intensifies the warning: like death, power’s appetite is inexhaustible and indifferent to individual claims. The line also implies that popular rule is not automatically safe; majorities can be as acquisitive as monarchs. Liberty, therefore, depends on limits, accountability, and vigilance.