Lind could feel the vast difference in power from the Apprentice Tier to the Journeyman Tier. The names also made far more sense to him now.
An Apprentice Tier was literally all about the internal path to that point. The cultivator had struggled, explored, and consolidated their internal path and had to fuse it with the Mystery energy to condense core concepts into a physical form to use as the new foundation of their power in the Divine Realm.
As such, meditation, internal resolutions, and inspiration on everything they had learned could lead to explosive growth in that Tier. All the tools were there but the cultivator had to sift through it and refine what was best for them in their dantian.
It was the same thing as a person that took on a trade job and grasped the fundamentals of their profession. Previous education and experiences added to understanding how to build that new knowledge base for their new job.
