What does it mean?

Raja then went towards the staircase leading to the eleventh floor, and then when he was standing in front of it, he suddenly turned around and said, "Oh, I almost forgot. You said that my essence is that of Illusion, but you are wrong. My essence is not that."

Upon hearing this the woman looked at him confused, and then said, "Sure. I'll remember that."

"Great.", and then Raja went down to the eleventh floor.

When he got there, the attendant who accompanied him there asked him how he did, and then he said he hadn't passed. The two then proceeded to the second floor, while talking, and when Raja got there he said goodbye and then left the building.

As he left, people were looking in his direction, but after a short time they stopped looking at him, as if what he had done was something normal. The only one who kept looking in his direction was the attendant, since he knew how difficult the intelligence test was compared to the others.