For those reading this forum thread and feeling like:
"Yeah but I'm not like that or I don't think I can do that".
Then don't worry, its very common to feel like you can't associate with something that might be very different or new. But the great news is that its probably going to be easier for you to learn (no joke!) than for someone that has a more comfortable "grip" on it intellectually. Why might it be easier for you? Well, we're used to living in the external world, we're used to thinking, we're not used to feeling in the sense that daniel talks about. People who "know" more are usually more inclined to rely on their intellectual understanding than on their "feeling". For some, having "knowledge" about something is a disadvantage. It limits their openness and sensitivity to explore another perspective - they're less open to the non-thinking stuff, because they're more "grounded" in the thinking stuff.
So you have an advantage! And its simpler than you think to get started
If I may suggest possible helpful guidelines
to develop a beginner's guide for learning one part of daniel's explanation - the "feeling" part (which a lot of people might not know how to develop);
Keep this in mind
1. Let go of performance-pressure. Relax, be comfortable, this is enjoyable and pleasant. Make a point to feel comfortable with everything you do in exploring this.
2. Its all about learning to receive, learning to be, as opposed to trying to force or control or "act". Willpower is an important tool, and it will always be at the ready - but so is complete comfort with stillness and comfort in "letting go". This is easy, not hard. Simple, not complicated.
3. Assume nothing.
Basic Practice Phases
1. Sit or lie on things like beds, couches, benches, or the grass outside and just be still while on it. When being still, its easier to get into "receive" mode - most of us are always on "transmit" mode. Thinking, planning, reflecting - that's your mind transmitting thoughts the whole time. When still, then thoughts and feelings can be picked up of things and beings around you. Just feel out small things. Pick up objects. Close your eyes. Listen with your heart to it. Observe your thoughts or pictures in your head, observe any feelings, any sensations that might come up. You will be surprised to find that thoughts come to you that is a different style to how you normally think - or your body feels slightly different. You might get a sense of awareness of a place (like the couch you're sitting on) or an object (e.g. the mug you are holding) that you can't distinguish - but you sense there's something there "to be felt", you just can't "feel it yet". That's perfect! That's great progress when you start getting that sense. Just keep doing that, "send out your feelers" - while paying attention to your thoughts, your body, your 'feelings'. Just be aware in an attentive state - whether you get anything or not. Keep practising until you feel ready to try out more
2. When you feel ready to try out more, you could "send out your feelers" to a place or object around you and imagine what it would sound like if it could talk. Would it speak with an accent? Would it have a squeeky voice? What personality does it have? Describe it, write it down, feel it out. You might think its your imagination, but trust yourself - its not just your imagination. You are picking up its colors, flavors, scents, etc. - you are using your non-corporeal senses to "check it out" - and by so doing you are exercising those senses. Upping your sensitivity. From here on with a little practice you could soon develop very detailed descriptions of places or objects - even though it seems nonsensical - its not. Its just an expression of how some of your 'other senses' are perceiving it. Keep practising this until you feel ready for the third step.
3. Now, you might be ready for the next one. BECOME the place, or the object. Become one with it in your thinking and your feeling and in your being - not in an act or "trying to observe" mode. No, this is different. This is "becoming" the object or place. Viewing things from its perspective. Experiencing reality through its existence. See, feel, hear through it's senses, not through your own senses. Be it. What is it like BEING this place? If it is a park, does it feel like a lot of energy courses through it because of many people going through it all day? Or does it feel like a still lake that is so relaxed it just sinks and seeps into the earth in complete restful and blissful surrender?
Now you're getting into "locking" onto things. The above might even be applied with telekinesis since its really just learning how to "lock onto the 3D Time coordinates" of whatever you want to in 3D space.
Edit 11 Dec: I'm not implying this is all you'll need to accomplish what daniel describes. This is one way of starting to get in touch with non-physical senses. The actual work required to "know what you're looking for" is an entirely different thing. This just gives u some tools to get started.
Extra Notes for beginners
1. Remember you can always ask about your experiences - no matter how strange.
2. If you have had experiences with external influences or beings that interact with you in an unpleasant way in any of your "non-physical" experiences in the past, the above might make you more sensitive to it - but will also teach you more confidence and ability to control and focus your attention. Remember - just like in physical 3D space, there's the good, the bad, and the ugly in 3D time / astral places. Learn and use appropriate "mental" protection, just like you would wear safety gear when going into a construction site. Most people reading this will know what I talk about, but if you don't, ask about it if you feel you need it.
3. Don't become dependent on 2nd-hand information, but feel free to use it for reference to get your bearings quicker. Others - whether human or whatever, can only share their perspective. Only you can discover for yourself what really "is". Apply wisdom that seems useful, but don't take things others say as alpha and omega absolutist doctrine even if you respect them.