CC Ādi 6.20

advaita-rūpe kare śakti-sañcāraṇa
ataeva advaita hayena mukhya kāraṇa
Synonyms: 
advaita-rūpe — in the form of Advaita Ācārya; kare — does; śakti-sañcāraṇa — infusion of the energy; ataeva — therefore; advaita — Advaita Ācārya; hayena — is; mukhya kāraṇa — the original cause.
Translation: 
In the form of Advaita He infuses the material ingredients with creative energy. Therefore, Advaita is the original cause of creation.