True, the narrator can be all of those things. Some examples include the following:
Major Character who's the narrator: Hazel Grace Lancaster in The Fault in Our Stars
Minor Character who's the narrator: Nick Carraway in The Great Gatsby
Protagonist: Esther in Sylvia Plath's The Bell Jar (narrated in 1st Person POV)
Antagonist: Amy Dunne in Gone Girl by Gillian Flynn
Answer:
Lying is probably one of the most common wrong acts that we carry out (one researcher has said 'lying is an unavoidable part of human nature'), so it's worth spending time thinking about it.
Most people would say that lying is always wrong, except when there's a good reason for it - which means that it's not always wrong!
But even people who think lying is always wrong have a problem... Consider the case where telling a lie would mean that 10 other lies would not be told. If 10 lies are worse than 1 lie then it would seem to be a good thing to tell the first lie, but if lying is always wrong then it's wrong to tell the first lie...
Acknowledgement
Nobody who writes about lying nowadays can do so without acknowledging an enormous debt to this groundbreaking book: Lying: Moral choice in public and private life, by Sisela Bok, 1978.
Why is the baby crying? Did he get it to stop crying? Poor baby.
When Nelson Mandela was inaugurated as President of South Africa on May 11, 1994 he made his historic "Glory and Hope" speech. The speech was so-named because of the opening line.