Nisioisin said this quote

The most intelligent people disguise the fact that they are intelligent. Wise men do not wear nametags. The more people talk about their own skills, the more desperate they are—their work should speak for itself.

~ Nisioisin

We have learnt a lesson: words written in books, all of them, are lies. There are no exceptions. Words written on papers are all deceitful.If we put it in a more proper manner, counting non-fiction works, then things like documents, reports, and reviews that are recorded are also deceitful.There’s nothing but deceit.Don’t believe in the for-sale literature.

~ Nisioisin

I have nothing to do with him,” L said. “To be completely accurate, I do not even know B. He is simply someone I am aware of. But none of this affects my judgment. Certainly, I was interested in this case, and began to investigate it because I knew who the killer was. But that did not alter the way I investigated it, or the manner in which my investigation proceeded. Naomi Misora, I cannot overlook evil. I cannot forgive it. It does not matter if I know the person who commits evil or not. I am only interested in justice.”“Only... in justice…” Misora gasped. “Then... nothing else matters?” “I wouldn’t say that, but it is not a priority.”“You won’t forgive any evil, no matter what the evil is?” “I wouldn’t say that, but it is not a priority.”“But...”Like a thirteen-year-old victim. “There are people who justice cannot save.” Like a thirteen-year old criminal. “And there are people who evil can save.”“There are. But even so,” L said, his tone not changing at all, as if gently admonishing Naomi Misora. “Justice has more power than anything else.”“Power? By power... you mean strength?”“No. I mean kindness.” He said it so easily.

~ Nisioisin

Every mystery novel I ever read, the great detective was such an arrogant fuck you could replace 70% of his dialogue with 'Are you stupid?' and the conversation would still make sense.

~ Nisioisin