A Jedi's promise must be the most serious, the deepest of his or her life.
A Jedi seeks not adventure or excitement, for a Jedi is passive, calm, and at peace.
>>> A JEDI KNOWS THAT ANGER, FEAR, AND AGGRESSION LEAD TO THE DARK SIDE. <<<
A Jedi uses the Force for knowledge and defense, never for attack.
There is no "try," only "do."
Believe and you succeed.
Above all else, know that control of the Force comes only from concentration and training.
from:
https://www.templeofthejediorder.org/doctrine-of-the-order
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Peace is a lie, there is only passion.
Through passion, I gain strength.
Through strength, I gain power.
Through power, I gain victory.
Through victory, my chains are broken.
The Force shall free me.
from:
https://starwars.fandom.com/.../Code_of_the_Sith/Legends
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the lesson is that hatred, anger, raw uncontrollable emotion is the path of the dark side of the force. That doesn't mean that it will be your undoing, it's just another way of living your life. In real life, many people follow their passions and let their anger consume them, and they become very successful. However, the cost is that these people never feel peace and can do very damaging/sith things to other people, which is exactly the opposite of the Jedi way.