If you wrote a book where the first and last sentences were the same but had different meanings, what would that be?

Maybe this is what it would mean this way:
First Sentence: This is a suggestion!
Last Sentence: This being a commanding or some kind of to be implemented advice.
Because at the end of the book the whole perspective of life would be changed from the reader's point of view....(This case shall remain in our practical life where I assume this being said by some senior citizen in the last days of his life on death bed)
First Sentence: This is a suggestion!
Last Sentence: This being a commanding or some kind of to be implemented advice.
Because at the end of the book the whole perspective of life would be changed from the reader's point of view....(This case shall remain in our practical life where I assume this being said by some senior citizen in the last days of his life on death bed)