The Water Hollows Out The Stone

This image appears in Book I of De Rerum Natura, where Lucretius uses the slow erosion of stone by water as evidence for his atomist physics: even the hardest matter is being continuously, imperceptibly altered by the lightest force, if that force acts persistently over time. The metaphor carries a dual lesson — scientific (about the gradual efficacy of physical processes) and moral (about the power of patient persistence). Epicurus, whose philosophy Lucretius championed, similarly argued that small, consistent pleasures accumulate into a life well lived.