“A novel which does not give the utmost satisfaction to its author is an immoral novel”

Simplified Meaning:

When an author writes a book, they put a lot of their thoughts, feelings, and hard work into making it. If the author doesn't feel completely happy or satisfied with the book when it's finished, it feels wrong to them. Think about cooking a meal for someone you love. If you don't cook it with care and it ends up tasting bad, it feels like you didn't put your heart into it and you would feel bad serving it. For a writer, their book is like their meal. They want it to be the best it can be. If they don't give it their all, it's like they're not being true to themselves or to the readers. This can apply to anyone doing any kind of work. If you try your best and feel proud of what you make, then it's like you did something good and right. But if you do something halfway and aren't proud of it, it's like you haven't done your job properly. Being truly satisfied with your work means you did it with honesty and care.