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Rāja-vidyā:  The King of Knowledge
It will simply act as fire. Similarly, we do not know how this material world is functioning, who its controller is, nor how it is controlled, and due to our ignorance we act in foolish ways, but nature is so stringent that she does not allow us to escape the reactions to our actions. Whether we commit an act knowingly or unknowingly, the reactions and consequent sufferings are there. However, through knowledge we can understand what the actual situation is, who God is, and what our relationship with Him is.
This knowledge by which we can gain release from suffering is possible in the human form of life, not in the animal form. To give us knowledge, to give us proper direction, there are scriptures written in various languages in all parts of the world. Lord Caitanya Mahāprabhu pointed out that people are forgetful from time immemorial about their relationship with the Supreme Lord; therefore Kṛṣṇa has sent so many representatives to impart the scriptures to man. We should take advantage of these, especially of  Bhagavad-gītā , which is the prime scripture for the modern world.