In Chapter 1, we learn that Douglass is owned by Captain Anthony, who is an extremely cruel master. He enjoys abusing and hurting his slaves, and particularly Douglass's Aunt Hester, who is quite beautiful. Douglass described the horrible treatment that the Captain inflicts on the aunt.
We also learn that this brutal behaviour leaves a deep mark on Douglass's mind. This is his first introduction to the world of slavery, and he finds it horrible and cruel. It is also a factor in Douglass's refusal to accept slavery as normal, and in his future endeavours to achieve freedom.