As a ninja, everyone has their own insistence on never giving in. This is the way of ninja.
Naruto's way of ninja is "Speak directly and do what you say."
Jiraiya's way of ninja is "Perseverance and never give up."
Kakashi said that people who don't follow the rules are trash, but people who don't cherish their companions are worse than trash.
So, what about Itachi?
Itachi's ninja is the most complex yet the simplest. There are many things he wants to protect, but in the final analysis, there is only one person - his brother Sasuke.
My, where is my nindo?