Lord Krishna's teaching accommodates diverse levels of learners – from the most elementary to the most philosophical or the most profound. While the Lord explains to Arjuna the sacred secret that is the greatest and ultimate knowledge (Raja Vidhya), He points out that despite it being inaccessible and difficult, it is still directly attainable (provided it is understood clearly) to those who are keen to gain access to it through meditation. The desire to understand has to be matched with the determination to be engaged in regular study and reflection.
The mysterious and impenetrable nature of Truth and the limitations of the human intellect together make its comprehension difficult. Human intellect at best is able to get only glimpses of Truth and, failing to grasp its entirety, remains prejudiced.
In this context, Arjuna exemplifies the ideal disciple, for he is willing to listen patiently, and remains unbiased. The Lord reinforces that only with tremendous faith in the teaching can one make the intuitive leap to comprehend the Truth. Accessing this knowledge is possible by personal experience when direct acquaintance with the truth validates it. For, knowledge that remained as mere information combines with immediate experience to penetrate reality to grasp the profound nature of things. This esoteric and hidden knowledge is the only means by which a soul can get liberated. It is totally aligned with the path of Dharma, promises harmonious existence and release from misery, and remains imperishable.