When an event or person comes at you, out of the blue, you have two basic choices. Accept, or throw a tantrum.
Rejection isn’t usually in the cards ~ what’s happened has already happened. And all a tantrum (or non-acceptance) accomplishes is to make the first experience with this new reality a negative one.
What’s the point of that?
I am not advocating a passive approach to life: we always have the option to form dreams and intentions. But if I have been diligent about that, and something comes that I did not expect, my goal for myself is to treat such an event as having more to offer me than I could dream up for myself (in the final analysis). I will then endeavour to unravel the mystery, to cross the divide between what I intended and what came about. This is an exercise in awareness.