"You my boy are the one with the Doujutsu, those rare eyes that allow humanity a glimpse at the unseen." He looked around, finally settling his gaze on a nearby pebble which he picked up. "What do you see here?" Naruto just blinked at the small rock, unsure if it was a trick question or not.
"A pebble?" Chukaku just nodded with an expectant gaze.
"Is that all you see?" Naruto just nodded with a furrowed brow.
"Yeah, why? Is it some kind of sacred stone or something?" Chukaku laughed out loud at that as he absently tossed the stone over his shoulder.
"Of course not my boy, it's just a pebble. Now look at me, what do you see?" Again Naruto seemed puzzled by the question as he gazed at the old monk intently.
"I see you?" Chukaku gave a sagely smile as he stood up to his full, if rather unimpressive full height.
"But is that all you see?" Naruto blinked at that, frowning as he peered at the old monk.
"Well you have this weird blue outline like you're glowing." Finally Chukaku grinned, patting the small boy on the shoulder as he turned to move on further into the temple.
"Well then there's your answer. What you are seeing, or at least I can only assume, is Chakra; my Chakra to be specific. You could not see it in the pebble because it is not alive so it cannot produce its own energy like plants or animals can." At this Naruto frowned, falling into step behind the wizened monk.
"But the pebble had an outline too." Chukaku stopped at that, blinking once before turning back to look at Naruto. "It was kind of green but it was weird, like I couldn't quite see all of it, like a puzzle piece without the rest of the puzzle." He groaned at that, one hand going up to pull at his hair in aggravation. "I don't know how to explain it but it's like that." Chukaku merely patted him gently on the shoulder, a serene expression on his face.
"It's alright Naruto; some people have spent their entire lives trying to unravel the mysteries of Chakra and the many forms it comes in. Few succeed and fewer still are willing to divulge that information. In fact the first, and last, was the very same man whose eyes you share." Naruto looked up in surprise at hearing there was somebody else with eyes like him.
"Who?" Chukaku gave him a mysterious smile as he pushed open a door into a large room, filled with shelves stacked to the brim with various books and scrolls. The old monk walked over to one of the older shelves in the room, some of the corners having gathered many cobwebs. He tutted for a few moments as he looked over the shelves before picking out a book and blowing the fine layer of dust that had accumulated. He opened it, skimming through the pages until he came across what he was looking for.
"This man, the Sage of the Six Paths." He dropped the book onto the desk, earning him a few stern looks from the other monks trying to read as well as a small cloud of dust which had Naruto coughing. When his eyes finally stopped watering he looked down at the page the book was opened to. It was an image of a man, or at least the silhouette of a man, standing before an enormous beast with ten tails and a single red eye filled with nine tomoe in concentric circles. A sword was in one hand and a shakujou in the other, held up as if warding the beast off. It seemed to be a rubbing of a wood carving as there were no photos from that era.
"Who was he?" Chukaku looked down at the image of the man said to be the founder of Shinobi, the first man to both discover and unravel the mystery of Chakra.
"Well by your eyes I suspect your ancestor, distantly of course. He was said to have lived over a thousand years ago after all." Chukaku flipped the page revealing another image this time of a rather crudely drawn but none-the-less shockingly similar image of a pair of Rinnegan eyes. Naruto traced the circles radiating out from the pupil with awe in his eyes, even as his other hand lifted up near his own eyes.
"What was he like?" Chukaku chuckled lightly at that; he could remember standing before this very book in one of his countless sessions with his own master, the previous head monk, asking that very same question so he knew just what to say.
"Unfortunately not much is known about him. History doesn't stretch that far back as far as written records go. From what we know he seemed to be some kind of wandering holy man, spreading his teachings about Chakra and peace. Eventually he battled a great evil, banishing it from the world forever." Naruto thought back to the enormous creature from the first image and shuddered, he couldn't imagine fighting something like that, and it was only a picture! "He was also said to have created the moon." Naruto spun around, looking up at the older man with incredulity to which the monk just chuckled. "But I don't put too much stock in that particular legend." Naruto returned to slowly tracing the image of the Rinnegan, awe in his eyes.
"He must have been powerful." Chukaku just nodded at his side, an intense look on his wizened features as his gaze drifted from the book to Naruto himself.
"You know they say his power came from his eyes, the eyes you now have." Naruto turned back to him, blinking in confusion as Chukaku placed a warm and firm hand on his shoulder. "You may have been given a powerful gift, even if the circumstances were terrible. Those eyes give you unrivalled potential you know and with that potential comes great responsibility, I just hope you'll remember that when you have power one day." Naruto stared at him for a moment with wide eyes before nodding resolutely, fire in his eyes.
"Good, I see great things in your future Naruto-kun. Now come, there's somebody I want you to meet."
"Chiriku-sempai why are we out here?" The small blonde was sitting in the middle of the largest training ground in the temple. It was towards the back and surrounded by high stone walls with the same seals that protected the main door of the temple. It was used by monks seeking to train new techniques that they hadn't fully mastered yet where they wouldn't pose a threat to the rest of the temple.
"For safety reasons Naruto, we don't want anybody getting hurt when we try this." Naruto just groaned as he rocked back and forth, the large stone slabs that made up the floor were very uncomfortable.
"Try what? You keep acting all mysterious sempai." Chiriku finally gave a satisfied nod as he looked over three seals he had been setting up on the wall of the training ground. It mirrored the three others on all the other walls; Chakra suppression seals. The bald monk honestly didn't believe that such a small boy could pose that much danger but his master had told him to take extra precautions so that is what he was doing.