There is no way for you to know for sure before the judgment day about its acceptance or rejection.
Indeed, but this is not even the question. The question is if it is conditioned with the acceptance and I have absolutely no way of knowing it, what other than certitude, if I don't have that, on the acceptance is going to alleviate and mollify me of my suspension of it going otherwise, or keep on redoing it till that divine certitude is attained .
If on the other hand it is not conditioned with the acceptance how philosophically may it be explained to have us bound to an obligation which will not, at the end, be judged in the light of its integral purity, not known to us.