By this I mean, in a novel where it's generally 'he said/she said' and 'he/she/they did this or that' essentially recalling events, is it acceptable to have the speaker interject with their own opinions of topics raised, instead of views simply remaining expressed through the characters in their thought or speech? I'm not suggesting it would be in the way whereas it's meant to be bias and a means of imposing the author's views on the reader, but instead to encourage the reader to think outside of the box. Or would this be too transparent and not subtle enough? Can it tastefully be done without the novel coming across as having an apparent agenda for one idea or belief system? Another thing I felt I should add was it wouldn't be presented as being 'absolute' (i.e. this way is completely right and all others are false) but more of a 'what if' and let the reader decide for them self whether they agree with it or not. I've heard of some novels being filled up with pages of just political/religious/etc views, and not necessarily expressed from any of the characters, so I'm assuming it may have been done in this manner, but I am not completely sure of this, hence why I'm asking. Is it considered acceptable in the literary community or is it a bit too risky and should be avoided if not done skillfully? What are your thoughts on this?