eta tattva mora citte kaile prakÄÅ›ana
brahmÄke veda yena paá¸Äila nÄrÄyaṇa
eta tattva - all these varieties of truth; mora citte - in my heart; kaile - you did; prakÄÅ›ana - manifesting; brahmÄke - unto Lord BrahmÄ; veda - the Vedic knowledge; yena - as; paá¸Äila - taught; nÄrÄyaṇa - the Supreme Lord.
The heart of BrahmÄ was enlightened by the Supreme Personality of Godhead. This is Vedic information given in the ÅšvetÄÅ›vatara Upaniá¹£ad (6.18):
yo brahmÄṇaá¹ vidadhÄti pÅ«rvaá¹
yo vai vedÄá¹Å› ca prahiṇoti tasmai
taá¹ ha devam Ätma-buddhi-prakÄÅ›aá¹
mumukṣur vai śaraṇam ahaṠprapadye
“Because I desire liberation, let me surrender unto the Supreme Personality of Godhead, who first enlightened Lord BrahmÄ in Vedic knowledge through Lord BrahmÄ’s heart. The Lord is the original source of all enlightenment and spiritual advancement.†In this connection one may also refer to ÅšrÄ«mad-BhÄgavatam 2.9.30-35, 11.14.3, 12.4.40 and 12.13.19.