Understanding the significance of our own lives requires some understanding of scale. “Just as the microscope and telescope extended our vision into spatial realms once too minuscule or too immense for us to see, geology provides a lens through which we can witness time in a way that transcends the limits of our human experiences,” Marcia Bjornerud, a geologist, writes. The Anthropocene, she suggests, is a fine time to “adopt a geologic respect for time and its capacity to transfigure, destroy, renew, amplify, erode, propagate, entwine, innovate, and exterminate.” We need to know how to navigate our epoch: to recognize our profusion of scales and strive to understand, amidst their collisions, not just how to care for the world beyond us but how a person can be, what it means to stand as a morally vested individual.