Su Ren was a powerful genius whose talent was admired by many from the day he was first born.
He ended up with his master after a series of twists and turns where he was kidnapped by several sects and greater influences who wanted his talent for themselves.
In reality, his master wasn't some saint, but a great thief and someone whose name was dreaded by most. He never planned to pick up a disciple, but since fate allowed it, he did too.
Su Ren was raised in this kind of environment, where he was exposed to many things from a young age and learned the world from the perspective of someone who wasn't jaded or possessed by its social structures.
Still, it was hard to not grow arrogant when one was a supreme talent. Su Ren grew faster than any of his peers and took his number one spot on the Dimensional Leaderboard by the time he turned 60, something impossible for normal people.
And as a testament to his power, he held that spot for an entire decade.