In order to strengthen certain concepts and belief foundations, experience is key. Proof is relative to the beliefs of the observer, and experience is really the only true "knowing" there is. For example, you exist now. No piece of information on Earth can change the fact that you know you exist now. All scientists and teachers of all worlds of time could say you don't, but you know you do. No need to read a book. By definition, you would have to exist to even ask the question. With that understood, these experiments generate both mental and physical experiences, that allow you the ability to easily reference certain principles within yourself, as a form of objective evidence.
#1 Reality is beyond physical reality
Look into a mirror.
Move your hand, arm, or head, while only looking in the mirror.
Notice that you are moving because you are deciding to.
After you decide, the mirror translates your decision into what you see in the mirror as a reflection.
In general, physical reality, being the reflection that it is, works in much the same way. The physical reality mirror is all around you, and even makes up your body. It is a type of dimensional mirror within the reflections of space and time.
The core premise to understand, is that in order to see yourself and the reflections of reality within the mirror, you must by definition be beyond it. If you were not beyond the mirror, you would not be able to conceive of "within the mirror"; it would be a totally different experience within a closed framework, not capable of containing nor producing the idea of "within the mirror," relative to the example being explained.
The idea is that your physical make up; i.e., atoms, don't exist separately from reality itself, but is an integral experience that is what we colloquially refer to as "physicalness." When you think of something; e.g., a bowling ball, it doesn't physically exist in your brain, yet it is a perceivable aspect of your reality. If all that existed was the physical world, and no multidimensional consciousness, unconscious and unintelligent units of energy, such as atoms, that compose certain "biological persona apparatuses," such as the human brain, wouldn't have "room" for imagination or dreams.
Realize that the fact you are aware of the fact that you're looking at yourself, and have freedom to choose what happens in that mirror, is a proof that you are beyond physical reality itself. If you were not, if reality were just physicality, you wouldn't be able to comprehend this because you would be an unaware machine. If you're mind was completely comprised of the results from physiological chemical interactions, there would be a great contradiction within the concept of having the ability to self-reflect on one's physiological existence. If that were so, there would be no place for that experience of measurability to be had. There's no self-reflection of an android, and even if there was to any degree, there would be a limit to that self-reflection with regard to emotion, introspection, and cognitive imagination.
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#2 Everything is meaningless
Find texts that are expressed in a language you have yet to comprehend.
If you look at the words, you will realize that none of them register any definite concept into your awareness, other than the fact that the text exists.
They are meaningless symbols meant to evoke certain consensus beliefs, involving those that agree to share that idea. Likewise, regarding your experience of memory, emotion, and imagination, you give anything and everything meaning.
All meaning within experiential phenomena is inherently extrinsic unto itself. Every moment is thus devoid of any meaning whatsoever, yet paradoxically you fill it all with meaning for an experience of that particular concept within your reality.
Integrative Clarification: If you were to take your life and look at it as a series of pictures, such as that in a film strip, each picture would mean absolutely nothing. Once you become the character, you would create the meaning you believe is true to your life's story. There is nothing wrong with having no meaning, when something has no meaning, such as an artist's blank canvas, you can then "paint" the meaning you prefer to have, in order to create the experience you want. Whether it’s a joyful exhilarating experience or morbid and sad one, each painting is beautiful in its own right. Remember, the choice is completely up to you and who you allow to be part of the picture. All pictures in the strip have the same empirical value of 0, and every painting is a masterpiece!
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#3 You will always experience a reality
Simply relax, focus on feeling your body, and take a few deep breaths.
Become more cognizant of your experience of memory, emotion, and imagination, and perceive them as one whole idea.
To illustrate this point more, you might then wish to take a nap, and as you awaken, reflect on the fact that you are still experiencing a reality.
The idea is that you must always experience a reality, even when you go to sleep you will still experience a reality. You may wake up with little to no memory at all of the experience, but that doesn't mean there was no experiential reality. One could just as easily forget what they ate for breakfast, that doesn't mean they never had breakfast.
If there was no reality for you to experience, you by definition would not experience it. If there was a place of non-existence for you to go to, you would not be able to "go" because "going" is an experience.
This is all an epiphenomenon of the fact that linear time is relative, and doesn't empirically exist unto itself in reality.
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#4 There is only now
You are reading this now. Were you reading this a minute ago?
Your answer doesn't matter, because now you are imagining a parallel reality that fits the description of "a minute ago."
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#5 You can experience a type of nonphysical reality
Get a good night's sleep in which you can sleep for as long as you like, without having to worry about alarms, or very stressful responsibilities to take care of upon awaking.
Once awake, you most likely can recall some remnant or mental vestige of a parallel reality which people call a "dream."
In your dream realities, you do all sorts of things in a body, the body is not physical.
These realities are a natural way that you experience nonphysical reality.
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#6 Everything already exists
Look at your computer screen and identify the pixels (the small grid of squares that create the image of your screen, most likely made up of subpixels).
Open up a regular picture of an event, or something you'd see in real life, and make it full screen. Consciously observe the content and the happenings of that particular picture, and remember the image's quality.
Close the window, and open up a new picture of a considerably higher definition, or lower definition, maximizing it to full screen once again.
Now examine the pixels of the higher definition picture, focus on the different qualities that seem more refined, and how the picture seems to hold more information. You may notice that the pixels of the computer screen have the potential to be any color and create any picture, yet the amount of pixels aren't changing.
The different pictures the screen presents to you are using the same old pixels. Every little variation of color, for even one pixel, is a new picture/experience. If you use your computer like how most do, there will usually be a variation to some degree in every minute you use it. This idea includes the movement of the mouse cursor, or even the time shown on the taskbar; however, you obviously can create stasis.
The idea is that the pixels already contain all pictures, videos, and what-have-you within them, but you only see what is relevant to what you are doing, because all other combinations are by definition not relevant.
Obviously in a very, very, finite, broad, one/two dimensional and simplistic way, this is how the reality of all that exists works for you, relative to the general human's reality perception.
The 360° 3-d physical "screen" of your life is constantly changing, just like your computer screen, it just shows what is relevant to the idea of your definition of yourself in the moment. You are the computer screen and the user at the same time, because it's two sides of the same coin.
