Lind's Law Eyes allowed him to see the makeup of the world on a more fundamental level than just the Qi that was everywhere. The Laws were what dictated those relationships.
It was the same as understanding fire made a room impossible to breathe in but later grasping that oxygen was what was consumed in flames.
It was why Immortals needed them to advance as their bodies and souls had blended. Simple surface level comprehension was no longer enough to refine their dantian at that point.
Only the more powerful forces behind the universe could advance their cultivation. Immortal Qi had to be refined by those same Laws to make it more powerful and fill the crystal.
Lind had never questioned what he saw but now he was in a strange place. It felt familiar and alien all at the same time. A forest like any he had seen before surrounded him but the feeling of the trees were like Gods.