"A devotee completely surrenders unto the Supreme, who reveals Himself by His causeless mercy. As stated in Bhagavad-gita, dadami buddhi-yogam tam. The Lord says, 'I give him intelligence.' What is that intelligence? Yena mam upayanti te. The Lord gives one the intelligence to cross over the ocean of nescience and come back home, back to Godhead. In conclusion, the cause of all causes, the Absolute Truth, or Supreme Brahman, cannot be understood by philosophical speculation, but He reveals Himself to His devotee because the devotee fully surrenders unto His lotus feet."
(Srimad-Bhagavatam, 4.11.23, Purport)
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