It is often called an epigraph (not to be confused with epitaph).
Preface, prologue, preamble, introduction.
The word for the beginning part that is 'reflective' is Prologue, and the word for the ending part is Epilogue.
An essay is a piece of writing.
The noun content is a word for things that are held or included in something; a list at the beginning of a book or magazine, showing the parts into which the book or magazine is divided; the subject, ideas, or story that a piece of writing deals with. Example sentence: The content of the box was a pleasant surprise.
Yes, the word 'essay' is a noun; a word for a short piece of writing, with a specific beginning, middle, and end, that provides information on a specific topic; a word for a thing.
No. Forward is a word. Foreword is also a word, which is a short piece of writing at the beginning of a book that services as a preface by the author to the material he or she plans to present in the text.
Diction is the word choice of a writer or author in a piece of writing.
Chapter
Genre
Grading, editing, proofreading.
The Gospel of John.John 1:1 - In the beginning was the Word, and the Word was with God, and the Word was God. [NKJV]
You're going about it backwards - great opening lines and titles come last. Write the book first, then the great line will come to you based on what you've written.
A palimpsest is a manuscript page, manuscript, or piece of writing material that has been written on or inscribed more than once, often with the earlier writing incompletely erased or obscured by the later writing.