Based on the text Disability Theory by Tobin Siebers, the ideology of ability is a pervasive system of belief that establishes able-bodiedness as the preferred state and the baseline for determining humanness, effectively asserting that "the lesser the ability, the lesser the human being". This ideology functions to suture a fundamental contradiction in modern thought: the simultaneous belief that the body is merely a vehicle for the mind and thus irrelevant, and the opposing urgent desire to perfect the body and eliminate death. Within this framework, disability occupies an invisible center, serving as the negative limit against which ability is defined; consequently, the ideology treats disability as an individual defect to be feared and eliminated rather than a common human feature. Its manifestations include the naturalization of technology used by the able-bodied (such as stairs) while stigmatizing assistive devices as burdens, the assumption that able bodies are capable of infinite self-transformation, and the projection of negative psychological traits, such as narcissism and bitterness, onto disabled people.