I guess the Buddha would not have given such addvices, remembering the countless we might have met, claiming to have seen a special task for them selfs. We percept, dream and see much, therefore I guess it is useful to focus just on reaching for example "knowledge of equanimity about formations" which is quite a lot to do, and I am sure even on 5% of the way to this stage, one would not give such speculations even a single time a chance. They (toughts about it) even would not let one start to strive for such a state.
Just that! *smile*
BUT! it is important to become a real Buddhist first. Like Punna did: Nate sante baram sokham _()_