I have confidence in scarlatti. I trust her. I know that she's as committed to this relationship as her straitened circumstances permit. I know that she's doing all in her power to work towards the time when we can be together. I know that she expends all her spare energy thinking about how that situation can come about. I know that she loves me. I know that she longs for the day when we can do away with this ridiculous distance that separates us. And, further, I know that she's working for that very same aim.
I know all these things. But more than that, I believe them. I accept them. I know that they're true without the benefit of external peer review, of experimental proof, of pronouncement from some accepted authority.
Just in case that wasn't clear.