Mark,

Apologise not for what you have said, a fair warning from a friend is a duty, to allow a misguided step without warning is negligence.  
Many enjoy wondering at the marvels of the world around us, the physícal and the spíritual, without giving heed to the pitfalls that also exist.
There is one world, one universe, the physícal and the spíritual are the same, one is comprised of the things our senses readily perceive, the other of things that are outside our normal range of perception. More on this another time.
As there are dangers within the spectrum of existence everyone perceives; it would be naive to think that the same does not extend also into the realm of the unseen.

Shaman