During seclusion, Sol's Fist Intent had reached a bottleneck that felt like an insurmountable wall, he wasn't able to pass it no matter how great his comprehension was or what he tried.
On his trip back to the Academy Sol had planned on going to the General Library and the Martial Arts Library so he could gain a deeper understanding of Fist Intent
Sol had never imagined he would master Fist Intent, so he barely had any knowledge of it. Thus, he could only rely on himself in seclusion.
But despite that, he had mastered his Fist Intent to the peak of the Greater Mastery Realm. There he felt that an insurmountable wall as well as a fog was clouding his mind.
However, now things were different. Seeing Althorne's Domain, he now knew what direction he needed to take. He felt like the fog clouding his mind had been obliterated upon seeing this Domain.