Khan's vast experience in lies and pretenses could give birth to reasonable justifications and excuses that even someone like Monica would believe. Yet, he didn't want to rely on any of that.
The imminent meeting would probably establish the relationship's future as long as Monica was willing to receive Khan. He didn't want lies to taint such an important step, but that desire left him in the dark.
Khan was still unaware of many aspects of Monica's character. He only knew where he stood, and she might not accept that. There was only uncertainty ahead, but Khan had to advance anyway.
The corridor went by, the elevator descended, and a familiar door eventually filled Khan's vision. He had reached Monica's room, but his arrival felt too early. A childish desire to postpone that event surged, but his resolve held firm, and a knocking noise soon resounded.