As Yama Dharmaraja taught Nachiketas, the vision of the Supreme cannot be attained by the mere study of Shastras; nor could knowledge of the Self come through subtlety of intellect or much learning or argument. The grace of God is the one thing necessary and for that the heart should melt in Bhakti.
Bhakti is different from Shastric learning. One may get by heart and recite without cessation the Sanskrit scriptures; one may know and repeat upside down the commentaries of the Acharyas. But righteous conduct and equanimity of mind are different and more necessary gifts.
When the heart has not mellowed, study and exposition of Shastras are a mere monkey game. Without wisdom in the heart, all learning is useless.
When that which is within and that which is without are one and the same, we have wisdom. When they are not, our learning is no better than the tricks of a trained monkey. The teaching of Sri Ramakrishna gives us, not mere learning, but true wisdom. ’
(Source: Introduction to Ramakrishna Upanishad)