What does as small as a world and as large as alone mean?

The phrase "as small as a world and as large as alone" suggests a paradoxical relationship between interconnectedness and isolation. It implies that while the world can feel intimate and close-knit—where relationships and experiences can make it feel small—individual feelings of loneliness can stretch vast and profound, making one feel isolated despite being surrounded by others. This juxtaposition highlights the complexity of human emotions and the duality of social existence.