Bhagavad Gita Chapter 18, Verse 21

पृथक्त्वेन तु यज्ज्ञानं नानाभावान्पृथग्विधान् | वेत्ति सर्वेषु भूतेषु तज्ज्ञानं विद्धि राजसम् ||

pṛthaktvena tu yaj jñānaṁ nānā-bhāvān pṛthag-vidhān vetti sarveṣu bhūteṣu taj jñānaṁ viddhi rājasam

That knowledge which sees various separate natures of different kinds in all beings, know that knowledge to be rajasic.

Krishna explains rajasic knowledge. 'Pṛthaktvena tu yaj jñānaṁ nānā-bhāvān pṛthag-vidhān vetti sarveṣu bhūteṣu'—that knowledge (yat jñānam) which sees (vetti) by separateness (pṛthaktvena) various separate natures (nānā-bhāvān) of different kinds (pṛthag-vidhān) in all beings (sarveṣu bhūteṣu). 'Taj jñānaṁ viddhi rājasam'—know (viddhi) that knowledge (tat jñānam) to be rajasic (rājasam). This is rajasic knowledge: seeing diversity and separateness, focusing on differences rather than unity. While sattvic knowledge sees the one essence in all, rajasic knowledge sees various separate natures. This knowledge is driven by rajas (passion), which creates division and sees things as separate entities competing or interacting. It's not wrong—it recognizes real differences—but it doesn't see the underlying unity. This is the middle kind of knowledge: better than tamasic (which is ignorant) but not as complete as sattvic (which sees unity).