When the quality of goodness is prominent, the sages and demigods flourish with the help of that quality, with which they are infused and surcharged by the Supreme Lord. Similarly, when the mode of passion is prominent the demons flourish, and when ignorance is prominent the Yakṣas and Rākṣasas flourish. The Supreme Personality of Godhead is present in everyone’s heart, fostering the reactions of sattva-guṇa, rajo-guṇa and tamo-guṇa.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
जयकाले तु सत्त्वस्य देवर्षीन् रजसोऽसुरान् । तमसो यक्षरक्षांसि तत्कालानुगुणोऽभजत्
jayakāle tu sattvasya devarṣīn rajaso'surān | tamaso yakṣarakṣāṃsi tatkālānuguṇo'bhajat
SB 7.1.8