"Every human being has hundreds of separate people living under his skin. The talent of a writer is his ability to give them their separate names, identities, personalities and have them relate to other characters living with him"

In this quote, Mel Brooks is suggesting that every individual has many different aspects to their personality and character that comprise who they are. A gifted author is someone who can bring these different elements to life by providing unique names, identities, and characters that can connect with each other and other characters in a story. Essentially, this quote indicates that a writer's capability to develop complex and dynamic characters is what sets them apart and makes their composing engaging and relatable.