Bhagavad Gita, Chapter 9, Verse 5

Nor do beings exist in Me in reality, behold My Divine Yoga! Bringing forth and supporting the beings, My Self does not dwell in them.

Even this real closeness comes with a real, deliberate mystery built into it.

Krishna names his own presence as genuinely mysterious, not fully graspable by ordinary reasoning. That mystery is treated as real and worth naming directly, not glossed over.