"He is indebted to his memory for his jests and to his imagination for his facts"

This quote by Richard Brinsley Sheridan recommends that an individual's wit and understanding are both originated from their own minds. He implies that a person's jokes originate from their memory, while their truths come from their creativity. This recommends that an individual's understanding is not necessarily based upon facts, however rather on their own creative analysis of the world. It also indicates that a person's wit is based on their ability to remember and use past experiences. This quote is a reminder that understanding and wit are both based on an individual's own mental professors, which they must not rely solely on external sources for their details. It is a pointer to use our own minds to produce our own interpretations of the world, and to utilize our own experiences to create our own jokes.