your expectations won't be met

Accept with equanimity all your expectations won't be met.

The good news is you only made up your expectations in your head, and we know little about how this all works, and what is ultimately best. Does that help you let go? Doesn't matter if we understand the request is to let go anyways.

There's a great poem by W.H. Auden "Leap before you Look". Look if you want to, but you're going to have to leap anyways. It's kind of like this. Expect if you want to, but you'll have to accept anyways. No, you're right, you don't Have to accept, but there will be less suffering if you do.