i highly disagree with that statement.
A)if it were only a delusion, why does herbal magick help so many people when they are ill, and no, modern doctors didn't discover herbs (well most, as far as i know)

the only skewed perceptions that you may recieve are only when you may be taking some form of hallucinogenics(i know i spelled that wrong)

C) its only strange to those who may not be familiar with it and possibly fear it. for example, i find it to be a strange practice that Christians kneel when praying to their God. i'm not trying to offend anyone by saying this, i'm simply using another religion's practices as an example

i hope i haven't wandered into too much of the religious aspect of magick...