I draw on my experiences of passing as non-disabled to explain how a disabled person can hide his disability, why he might do so, and what costs and risks he and others might face along the way. Passing as non-disabled can bring greater social acceptance and inclusion in joint projects, an enhanced sense of belonging, pride, and self-worth, and an easier time forming and maintaining personal relationships. Yet hiding one’s disability can also undermine some of these same values; for example, it prevents someone from living up to normal social expectations or sharing important aspects of himself with others. Hiding a disability can also interfere with a person’s self-respect, self-acceptance, integrity, and self-development. Although the chapter does not take a stand on whether hiding a disability is, overall, prudent, wise, or morally justified, it draws out some lessons about disability from why someone might want to hide it.