This 'just the tip' situation really stymied Daneel, but the Empire Spirit continued.
"Look. I know that you don't trust me. I am actually glad that that is the case. It shows me that you are someone cautious. But I really don't have a choice here. I need you to believe me. My method of securing entry for you is that I will pretend that I turned, just like the Black Raven Empire Spirit. After turning, I will claim that I managed to take control of you, as you are, after all, a once in a century talent. You rapidly used the technique I gave you and mastered it, so I managed to complete the possession very fast. In reality, the technique I gave you has no such backdoor, unlike the one the Black Raven Empire Spirit gave your friend. Again, I can't make you believe that, but that isn't important right now. What's crucial is this chance. The Black Raven Empire Spirit will believe this and let you in, as I'll be claiming that I'm there to protect it during its possession."