The journey from nigla, the revealed parts of Torah, to nistar, the esoteric parts of Torah, that demonstrates the unity in the Torah.
Various Gemara passages and the Zohar (Raia Mehemna Parshas Mishpatim (117b)).
The classic definitions for the tzadik ve’ra lo צדיק בינוני רשע address their judgment and reward or punishment.
The more involved terms of tzadik ve’ra lo and tzadik ve’tov lo, (צדיק וטוב לו, צדיק ורע לו) address the apparent inequity in Hashem’s world and why some tzadikim suffer while some wicked people seem to prosper; that it has to do with imperfection that needs repairing.
The Zohar, (Raya Mehemna 117b) completely redefines these terms: A wicked person has evil which is subservient to good.
This opens the window for the esoteric parts of Torah.
It is supported by the Gemara where Rabbah calls himself a beinoni which cannot even be an acceptable mistake based on the paradigm of Jewish law.