Answer:
What Heumann mean is that the barriers they face (due to the disability) are just external (outward) -- this means that internally, there are no barriers. What they can do and achieve as a result of inherent potentials cannot be hindered by their external barriers.
Explanation:
Heumann reveals that disability does not mean that they are disadvantaged as people may think. She said that people will think that those of them with disabilities will rather choose not to have it. Even though they face barriers; those barriers are just outward and does not bar their internal potentials and talents.
