hi -
i think it makes no difference to "seeing things". if a being wants to be seen, they will show themselves to you. now your belief or your sesnitivity can make a difference (not belief as in religious, but belief as in not blocking the being).
I was startled very much the other day by 2 angelic beings - huge, beautiful, frightening. But then they were gone.
I am not a believer - but i do accept.
kiya