Explaining The Theme
The first theme is what might be called an “implied truth”. For example, the theme of a book can sometimes be expressed in a simple adage such as “crime doesn’t pay”. Imagine a book about a character (call him Joe) who is a computer genius.
He plans a scam that brings him a great deal of wealth, while taking just a few pence from thousands of other people. He is never caught, and retires from crime after that one heist.
The theme of this story might be expressed as any of the following, depending on the way the story was slanted;
(1) Real intelligence is not being caught.
(2) Little losses for some mean great gains for others.
(3) Once is enough.
(4) Genius deserves what it can get.
Now, suppose the book is changed a little. Joe sees needy children and plans a scam that brings a great deal of wealth, while taking just a few pence from thousands of other people. He donates the money to charity, and is never caught, and retires from crime after that one heist.