Bhagavad Gita Chapter 7, Verse 26

वेदाहं समतीतानि वर्तमानानि चार्जुन | भविष्याणि च भूतानि मां तु वेद न कश्चन ||

vedāhaṁ samatītāni vartamānāni cārjuna bhaviṣyāṇi ca bhūtāni māṁ tu veda na kaścana

I know the past, present, and future of all beings, O Arjuna, but no one knows Me.

Krishna reveals His omniscience and the asymmetry of knowledge. 'Vedāhaṁ samatītāni vartamānāni cārjuna bhaviṣyāṇi ca bhūtāni'—I know the past, present, and future of all beings. 'Māṁ tu veda na kaścana'—but no one knows Me. This verse shows Krishna's complete knowledge—He knows everything about all beings, across all time. But the reverse is not true—no one fully knows Krishna. This asymmetry reveals Krishna's supreme nature: He is the knower of all, but He Himself is not fully known. This connects to verse 7.25's teaching about Krishna being veiled and verse 7.3's teaching about the rarity of knowing Krishna.