As Fiver notices it, the main streams of Christianity don’t find that lucid dreaming is dangerous by itself. Though I’m not a believer, I’ve been brought up with Catholic education. I never heard that Catholics were against lucid dreaming. You can’t find on catholic websites anything related to lucid dreaming or astral, neither on the CEF (Conférence des évèques de France - French Bishops Conference) nor on the official Vatican website.
On the Vatican website, they consider that all practices which are associated to the New Age movement are innocuous by themselves - I consider that lucid dreaming and astral projection can be included in the New Age practices. What is more important in their eyes is, that the whole New Age ideas create a system of beliefs that doesn’t agree with the Scriptures.
The further texts from the Vatican website are translated by myself, I hope I didn’t make any mistranslation.
“It is certain that the New Age creates its own atmosphere, and it is sometimes hard to distinguish between what is innocuous and what is questionable”.
What they think that must be contested is the belief that we can reach God by ourselves, without His intervention.
“The goal of the New Age techniques is reproducing at will mystical states, as it was a laboratory experiment. Rebirth, biofeedback, sensory isolation, holotropic breathing, hypnosis, mantras, sleep deprivation and transcendental meditation are attempts to try and experience those states continuously. All those practices create a state of psychical weakness .”
Notice that they even don’t speak about LD’ing. I don’t agree with the psychical weakness but it’s my own opinion. What they consider more important is:
“Though they consist in going into the depth of heart and soul, they do remain essentially human attempts of an individual who seeks to rise to the divinity by his own means. It is often about a “rise” of the consciousness towards what is regarded as the liberating discovery of the “inner god”. All have not access to these techniques, whose benefits are reserved for a ‘spiritual aristocraty’. […] On the contrary, the main element of christian faith is the descent of God amongst His creatures, particularly amongst the feeblest, the most humble and the less gifted. There are spiritual techniques which are useful to learn, but God can do without them. The christian method in order to go nearer to God doesn’t require any technique. […] All the meditation techniques must be purified of any presumption and claim.”
Moreover, they think that many ideas which are conveyed in the New Age are inspired from teachings of occultists like Helena Blavatsky, Rudolf Steiner or Alice Bailey - and their books have nothing to do at all with the Christian point of view.
And that’s what I find really dubious in the webpage you pointed out cause this astral theory is just the one who was invented by those three persons, plus spiritist theories about astral entities. I sounds like anything but christian! Moreover the one who wrote this text obviously doesn’t know anything about LD’ing and AP. He just copied things which have been said by those occultists. As for me, I don’t believe in this astral theory.
And like DreamerDavious and Holy reality, I completely disagree with the paragraph about fear. God is not there to spread fear but Love : this is the main message of Christ and if a Christian forgets this basic point, it’s grave. For all this reasons, I don’t consider that what is said in this page is Christian.
Anyway, according to the catholic texts, what can divert us from God is not lucid dreaming itself but the associated belief that it can lead to a spiritual enhancement and a possible communication with God by our own means. It’s a gnostic - thus heretic, according to the Catholic Church - point of view. From the catholic point of view, what is important is prayer and love and if you really want to act in God’s ways, lucid dreaming or other New Age practices are just a loss of time and energy, like trying to have a bigger car, a better job, a newer fridge, etc. with the exception that if you believe you’ll meet God by your own means through lucid dreaming, you’re wrong. It may happen that God gives you a spiritual vision or something like that in a lucid dream, but it’s because He decided to.