Krishna reveals a subtle truth. Sattva, rajas, tamas — all three gunas and every state they produce — arise from Me. But I am not contained within them. They exist in Me; I do not exist in them.
The difference matters. A lamp illuminates everything in a room — the clean furniture and the dusty corners alike. The light is in the room, but the room's dirt does not stick to the light. In the same way, the divine is the source of all three gunas, but the gunas cannot bind or define the divine.
This is a source of great reassurance. The world's moods — clarity, restlessness, lethargy — all come from the divine's energy. But the divine itself remains untouched, free, beyond all of it.