Final answer:
Douglass claims that while there is a physical difference between the white and black races, the African American community is entitled to all natural rights.
Step-by-step explanation:
In the yellow highlighted section, Douglass claims that he believes in the physical difference between white and black races which will probably forever forbid them from living together on the footing of perfect equality. However, he also asserts that the African American community is entitled to all the natural rights enumerated in the Declaration of Independence, such as the right to life, liberty, and the pursuit of happiness. Douglass acknowledges the physical difference but argues for the equal entitlement to natural rights.