Without the mercy of the Supreme Lord, such esoteric subjects are incomprehensible, even if one spends many years researching them. Beyond the sensual realm lie indirect, subtle perceptions, which need to be properly understood. But they can be understood properly only if one sees their relationship to the inconceivable, transcendental Absolute Truth. Without seeing this connection, one will find all discussion of these subtle perceptions to be like beating the chaff for grain—a mere exercise in futility that brings only frustration and distress. Such empty sophistry may show off some mundane erudition, but it cannot help one make spiritual progress. In fact, these dry empirical debates often create big hurdles. So it is better to avoid them.
It is strongly recommended that one simply follow in the footsteps of spiritual stalwarts who act according to the scriptural injunctions and the spiritual guidelines given by saintly souls and guru. One should not raise too many doubts and questions. As the Lord states in the Bhagavad-gītā, tad viddhi praṇipātena paripraśnena sevayā: (BG 4.34) "Just try to learn the truth by approaching a spiritual master. Inquire from him submissively and render service unto him."