An inward impression does not reveal merely by its appearance whether its source is divine, self-generated, or deceptive. These are possibilities discussed in theology; assigning any one of them with certainty to a particular occurrence requires additional evidence.
If someone feels strongly that a known religious duty has been cancelled for them, the intensity of their feeling does not defeat an established rule. Conversely, a prompting toward a good act may be followed because the goodness of that act is independently known, not because every inward voice is immune to error.
It is therefore possible to respect the reality of inner experience while preserving the standards of proof. The former does not have to be denied in order to place legitimate limits on the latter.