All psychedelic explorers should be aware of the concept of what is called a cognitive hallucination. The is a much more insidious phenomenon. This is, quite simply, an out-and-out delusion.
Terence McKennaDon't worry. You don't know enough to worry. . . . Who do you think you are that you should worry, for cryin' out loud. It's a total waste of time. It presupposes such a knowledge of the situation that it is, in fact, a form of hubris.
Terence McKennaThe "just say no" campaign at this point is a lot like drawing sea-monsters over certain unexplored areas of the map and expecting people to stay away. It may work for some, but explorers live for this kind of thing.
Terence McKenna