When the doors of perception appear to open they reveal a vision. The harder we work to open the doors, the more invested we are in this vision being cool and groovy and having some form of specific significance.
It can happen that this vision crystallizes forming a stained glass barrier preventing actual penetration past the vision. Our expectations become a guardian blocking our way into whatever it is that we could see if only we could get past our own expectations.
Two things can help prevent this:
1) Keep your teacup empty or at least empty-ish.
2) Remember what the Black Lectroids from Planet 10 have to say on the topic: “No big deal.”