Curiosity is the mind's natural orientation toward the unknown — a state in which not-knowing is experienced as invitation rather than threat. The Sutras' description of the student's initial stage (mumukṣutva, the desire for liberation through understanding) is a form of radical curiosity directed toward the deepest questions. Cultivating curiosity as a habitual relationship to experience — rather than treating it as a personality trait one either has or lacks — transforms the quality of engagement with everything encountered.
Each step builds on the last.