"How she longed to escape the dark hall and explore the bright gardens filled with colorful flowers and refreshing fountains. However, she was unable to even pass her head through the doorway, let alone proceed further," the passage describes Alice's desire to venture into a brighter, more joyful world that she finds impossible to reach at that moment.
"And even if her head could fit through the door," Alice muses, "it would be pointless without her shoulders." She wishes she could shrink herself instantly, like a telescope collapsing, to fit through the small opening, and ponders how she might begin such a transformation. Her thoughts reveal her longing for escape and her imaginative attempts to find a way out of her predicament."