Read Narottama dasa Thakura’s Prarthana, Bhaktivinoda Thakura’s Prarthana. They are very, very valuable for advancement of spiritual understanding, especially Narottama dasa Thakura’s Prarthana. So, by reading them, by understanding them, we can understand Krsna very easily. Otherwise, it is very, very difficult to understand Krsna.
From Srila Prabhupada’s lecture on Sri Caitanya-caritamrta, Adi-lila 7.2 — March 2, 1974, Mayapur