Srimad Bhagavatam Canto 10, Chapter 02, Text 19

SB 10.2.19

sa devaki sarva-jagan-nivasa-
 nivasa-bhuta nitaram na reje
bhojendra-gehe ’gni-sikheva ruddha
 sarasvati jñana-khale yatha sati
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
Devaki then kept within herself the Supreme Personality of Godhead, the cause of all causes, the foundation of the entire cosmos, but because she was under arrest in the house of Kamsa, she was like the flames of a fire covered by the walls of a pot, or like a person who has knowledge but cannot distribute it to the world for the benefit of human society.
Purport by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada: 
In this verse the word jñana-khala is most significant. Knowledge is meant for distribution. Although there is already much scientific knowledge, whenever scientists or philosophers awaken to a particular type of knowledge, they try to distribute it throughout the world, for otherwise the knowledge gradually dries up and no one benefits from it. India has the knowledge of Bhagavad-gita, but unfortunately, for some reason or other, this sublime knowledge of the science of God was not distributed throughout the world, although it is meant for all of human society. Therefore Krsna Himself appeared as Sri Caitanya Mahaprabhu and ordered all Indians to take up the cause of distributing the knowledge of Bhagavad-gita throughout the entire world.
yare dekha, tare kaha ‘krsna’-upadesa
 amara ajñaya guru haña tara’ ei desa
“Instruct everyone to follow the orders of Lord Sri Krsna as they are given in Bhagavad-gita and Srimad-Bhagavatam. In this way become a spiritual master and try to liberate everyone in this land.” (Cc. Madhya 7.128) Although India has the sublime knowledge of Bhagavad-gita, Indians have not done their proper duty of distributing it. Now, therefore, the Krsna consciousness movement has been set up to distribute this knowledge as it is, without distortion. Although previously there were attempts to distribute the knowledge of Bhagavad-gita, these attempts involved distortion and compromise with mundane knowledge. But now the Krsna consciousness movement, without mundane compromises, is distributing Bhagavad-gita as it is, and people are deriving the benefits of awakening to Krsna consciousness and becoming devotees of Lord Krsna. Therefore the proper distribution of knowledge has begun by which not only will the whole world benefit, but India’s glory will be magnified in human society. Kamsa tried to arrest Krsna consciousness within his house (bhojendra-gehe), with the result that Kamsa, with all his opulences, was later vanquished. Similarly, the real knowledge of Bhagavad-gita was being choked by unscrupulous Indian leaders, with the result that India’s culture, and knowledge of the Supreme were being lost. Now, however, because Krsna consciousness is spreading, the proper use of Bhagavad-gita is being attempted.
Srimad Bhagavatam Canto 10, Chapter 02, Text 18
Srimad Bhagavatam Canto 10, Chapter 02, Text 20