"Long before time had a name, Ninjago was created by the First Spinjitzu Master, using the Four Weapons of Spinjitzu. The Scythe of Quakes, the Nunchucks of Lightning, the Shurikens of Ice and the Sword of Fire. Weapons so powerful, no one can handle all of their power at once! When he passed away, his two sons swore to protect them, but the oldest was consumed by darkness and wanted to possess them. A battle between brothers broke out, and the oldest was struck down and banished to the Underworld. Peace returned, and the younger brother hid the weapons, but knowing his older brother's relentless ambition for power, he placed a guardian to protect them. And for fear of his own demise, a map for an honest man to hide. That honest man was your father. The older brother is Lord Garmadon, and I... need to find those weapons before he does."
—Sensei Wu, Way of the Ninja
"Good and Evil. There has always been a balance. But where I go, the balance can be destroyed. Soon I'll be strong enough to possess the Four Weapons, so I can recreate Ninjago in my image! ...You. You were always his favorite."
—Lord Garmadon, Weapons of Destiny
"Even lessons learned the hard way are lessons learned."
—Sensei Wu, Rise of the Snakes
"You will not hurt my friends. There is nothing that will hold me back. I know who I am!"
—Zane, Tick Tock
"All of my training to become the best ninja wasnt in preparation to become the Green Ninja. It was . . . to protect him."
—Kai, The Green Ninja
"Sensei once told me it's not the size of a Ninja in a fight, but the size of the fight in the Ninja."
—Kai, Day of the Devourer
"There comes a time when we all must grow up. When that time comes, it's important not to forget the lessons of our childhood. Because our childhood is the greatest training ground one will ever have."
—Sensei Wu, Child's Play
Overlord: "You can't defeat me! Where there is light, there will always be shadow!"
Lloyd: "Unless my light is bright enough!"
—Rise of the Spinjitzu Master
"Even in the darkness, we have the choice to reflect the light."
—Zane, Enter the Digiverse
"I... am... a Nindroid! And... ninja... never quit! Go Ninja, go!"
—Zane, The Titanium Ninja
"Only one can remain...."
—Season 4 Arc Words
"The greatest victory is that which has no battle."
—Sensei Wu, The Greatest Fear of All
"Whatever happens to me, wherever I am, I will always be with you. There comes a time where every boy must become a man. What sort of man, is up to him."
—Garmadon, in his final words to Lloyd, Curse World Part II
"You can only save those who want to be saved... Goodbye, Sensei."
—Morro, Curse World Part II
"If you want something bad enough, don't wish for it to happen — make it happen."
—Jay, The Way Back
"Control time, control everything."
—Season 7 Arc Words