The science of Kṛṣṇa, or the science of God and the living entities, is so subtle that even a personality like Vidura has to consult persons like the sage Maitreya. Doubts about the eternal relationship of the Lord and the living entity are created by mental speculators in different ways, but the conclusive fact is that the relationship of God and the living entity is one of the predominator and the predominated. The Lord is the eternal predominator, and the living entities are eternally predominated. Real knowledge of this relationship entails reviving the lost consciousness to this standard, and the process for such revival is devotional service to the Lord. By clearly understanding from authorities like the sage Maitreya, one can become situated in real knowledge, and the disturbed mind can thus be fixed on the progressive path.