Before reincarnation, Nezha was adrift in the endless Outer Chaos with the Chaos Pearl Fragment. At that time, space and time were inverted and chaotic; perhaps only a few days or months had passed in the Primordial world, but to Nezha, it felt like an endless solitude.
Wandering through Chaos could be said to have transformed Nezha's heart from an ordinary person's soul in his previous life into the true heart of a Seeker. The strength of his heart is actually the reason Nezha's cultivation advanced so swiftly.
Otherwise, how could a soul of an ordinary young man like Nezha's past life quickly master inhuman powers?
Only with a sufficiently strong heart can one control immense power; otherwise, the power will eventually backfire. This is also why the Mystic Sect undergoes heart-refining when encountering bottlenecks.
Great opportunities often come with great terrors; if one endures, they survive; if not, their soul collapses.