The question of Nārada to Vyāsadeva his disciple, that "My dear disciple Vyāsadeva, you have thoroughly inquired," jijñāsā, adhītam. Adhītam means, "You have studied thoroughly." What about? Brahman. Brahman means the Absolute Truth. Jijñāsitam adhītaṁ ca brahma, and the Absolute Truth, yat tat brahma sanātanam. Sanātanam means eternal. The conception of Brahman, Absolute Truth, is eternal. Brahman, the definition of Brahman is "that which is the greatest." Just like we say God is great. Greatest. And increasing also. Brahman is not limited. Just like we have got some idea, say, the sky, the greatest. But this is also increasing. According to astronomical calculation, the planets and the universe, they can increase. So the Absolute Truth, that is eternally increasing. There is no comparison of Brahman's increasement and magnitude. Sanātana, and that is also eternal.
So for spiritual realization this is very important thing, jijñāsā. Jijñāsā means inquiry. One who is not inquisitive, for him there is no progress, either spiritually or materially. In ordinary school also, the boy who inquires from the teacher always, he is considered to be very intelligent boy. Similarly, in our householder life, sometimes, generally, the children, they inquire from the parents: "Father, what is this? Father, what is that?" That boy, that child, is supposed to be very intelligent. This is experienced. So for spiritual life also, one should be very seriously inquisitive and studious.