SB 3.6.24
hrdayam casya nirbhinnam
candrama dhisnyam avisat
manasamsena yenasau
vikriyam pratipadyate
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After that, the heart of the gigantic form separately manifested itself, and into it entered the moon demigod with partial mental activity. Thus the living entity can conduct his mental speculations.