[sterling_archer]

Read the thread you linked. Agree with author of the post you linked except on the bolded sentence. Its not essential if done prerequisites such as described in the works of Franz Bardon for example (mental, psychic training). But he is probably right when he said "for many".

P.S. I like your comment regarding double slit experiment. I don't agree with intelligent particles being actual deceptive spirits but doesn't matter as quantum physics proves that official story of "hard matter is all there is" is total bullshit. Quantum physics is one of the few mainstream sciences that actually got close to non physical realities, but it doesn't know that yet.