Quote by Mark Twain
My books are water; those of the great geniuses are wine -- everybody drinks water.

Summary
This quote suggests that the speaker's books are accessible and relatable, like water, which is a basic necessity. On the other hand, the books of great geniuses are compared to wine, implying they are more profound and enjoyed by a select few. The analogy implies that while anyone can benefit from and understand the speaker's books, it takes a greater level of sophistication or intellect to appreciate the works of the great geniuses.
By Mark Twain