The soul is a concept on the base of the false self. The three states are mere mirage on the base of the soul, which is the true self. Therefore, perfect understanding is necessary to understand and assimilate what is truth and what is not truth.
Since people are stuck with the words of their accepted teacher and god men and stop their inner journey believing their masters words. Noting has to be accepted as truth without verifying them through deeper inquiry analysis and reasoning.
The people who are stuck with some teachings will block themselves to move forward in the inner journey. There is no need of any teaching, teacher in pursuit of truth, but only an intense urge to know and realize the truth.
