Jendo (Earth-2356)

"I'm not gonna run away and I never go back on my word, that is my jendo! My Jedi way!"

- Luke Skywalker

Jendo is a personal rule that each Jedi lives by. It is their way of life, their motto, belief, or "dream". A Jedi's jendo can be anything, no matter how immoral their personal point of view is. There is nothing stopping other Jedi from following another Jedi's personal rule, such as Hinata Hyuga and Jiraiya adopting Anakin Skywalker's jendo, or Rock Lee following Maito Gai's "My Rules" philosophy. It is also not uncommon for a Jedi to follow more than one jendo.

According to Sheev Palpatine, the jendo of the Sith is to exact revenge against their hated enemies. Conversely, the Jedi created what is known as the Will of Fire, which can be said to be the universal Jedi way of all the Jedi in the galaxy who follow the light side of the Force. In Iwa existed a similar philosophy known as the Will of Stone, which simply states that the planet's Jedi must be strong willed.

Kisame Hoshigaki's philosophy as taught to him by Fuguki Suikazan was that confidential information was more important than sentient lives, and he would go as far as to betray comrades, and even commit suicide to ensure that it remains secret.

Source

 * https://naruto.fandom.com/wiki/Nind%C5%8D.