This concept explores the allegory of the cross-eyed (ahwal) apprentice found in Section 10 of Attar's Asrar Nameh. In the story, the apprentice suffers from double vision and perceives two glass bottles where only one exists. When his master instructs him to break one bottle and bring the other, the apprentice shatters the single existing bottle and suddenly sees nothing. Metaphorically, the 'cross-eyed' condition represents the spiritual flaw of perceiving duality (seeing oneself or the world as separate from God) instead of realizing the absolute unity (Tawhid) of the Divine. The tale demonstrates how the illusion of multiplicity is a projection of one's own defective perception.