If you desire to be pure, have firm faith, and slowly go on with your devotional practices without wasting your energy in useless scriptural discussions and arguments. Your little brain will otherwise be muddled.

Understand the difference between mystical art and mystical knowldge. Devotional music, life stories of mystics and Gods, images, paintings etc. may temporarily transport you to mystical world but they can't give you mystical powers. Art is beautiful. Knowledge is boring. Ancient sages tried to mix art with knowledge. We discarded the knowledge but kept the art.

For my own part, I tend to find the doctrinal books often more helpful in devotion than the devotional books, and I rather suspect that the same experience may await others. I believe that many who find that 'nothing happens' when they sit down, or kneel down, to a book of devotion, would find that the heart sings unbidden while they are working their way through a tough bit of theology with a pipe in their teeth and a pencil in their hand.

If you desire to be pure have firm faith and slowly go on with your devotional practices without wasting your energy in useless scriptural discussions and arguments. Your little brain will otherwise be muddled.