When Gu Hang arrived in this space— one which didn't belong to the reality of the universe but was wildly violent—a torrent of knowledge flooded into his mind as if it were a deluge.
Initially, he thought he was under some kind of attack, and he strived to use his Spiritual Energy, in conjunction with [Iron Will], to fend off the countless fragments of knowledge from his consciousness.
But soon, the bits of knowledge that leaked through made him realize he shouldn't be doing that.
Of course, he didn't simply drop his guard. Instead, he used the capability of [Iron Will] as a filter, beginning to sift through the knowledge.
What was useful was absorbed, and then stitched together to form a coherent and valuable body of knowledge;
The useless, incomprehensible fragments were kept at bay.
To tell the truth, there were far more of the latter than the former.