Every child begins the world again.

The line treats childhood as a kind of perpetual genesis: each new person arrives with fresh perception, unburdened (at first) by inherited habits, conventions, and settled interpretations. In Thoreau’s broader thought, this aligns with his emphasis on direct experience—seeing nature and society for oneself rather than through received opinion. The “world” is not merely the physical environment but the meaning we assign to it; a child’s openness effectively recreates that meaning from the ground up. The aphorism also implies a quiet critique of adult complacency: maturity often narrows vision, while the child’s beginning suggests a model for renewal, attention, and moral or imaginative reawakening.