These are a few of my thoughts with regard to the spiritual realm. This realm is in a different dimension, different from space and time as we know it, and yet curiously interwoven with the natural realm in which we exist physically.
The realm of the spiritual may be compared to a universe parallel to the natural, but only in the sense that it coexists with the natural. This is nonetheless not a perfect comparison; there are certain important differences between the spiritual and the natural.
1. The spiritual is not exactly parallel to the natural. It is rather more accurate to say that the natural is a shadow of the spiritual. A shadow is a poor representation of reality, and specific features of an object cannot easily be deduced from its shadow. Depending on the ambient conditions, the appearance of a shadow may vary and not appear the same at different times and places. While the substance may not change, the shadow is subject to change, and there is a severe limitation to the accuracy of what can be seen in a shadow.
2. The spiritual is not governed by natural laws. Natural laws are a representation of spiritual principles. Therefore while the natural is subject to the spiritual, the spiritual is not subject to the natural. There are two principles in the spiritual, from which everything else arises: the principle of authority, and the principle of rebellion.
3. Because the spiritual is not governed by natural laws, it is impossible to interpret spiritual events according to natural laws. In the spiritual, for example, 2+2 may or may not be equal to 4, depending on the principle of the operator. Because parameters have different meanings and frames of reference, natural laws cannot be used to validate spiritual occurrences.
4. Spiritual occurences can sometimes be validated by observing their effect in the natural. Hence, while one may not be able to say "if 2+2 = 4 in the natural, it must also be so in the spiritual", one may be able to say "if xyz has happened in the spiritual, it is verifiable in the natural by its visible effect".
5. The spiritual realm is a realm of infinites and absolutes - infinite knowledge, absolute values. There are no grey zones or DMZs in the spiritual. Not surprising, if there is infinite knowledge. Grey zones are a result of uncertainties, and there is no such thing as uncertainty in the spiritual.
6. Time, space and the five senses are restrictions to which the natural is subject – a restriction that has no hold on the spiritual. For this reason, the natural mind is not equipped to comprehend spiritual things in the same way as a spiritual mind.
7. The spiritual supersedes the natural. Spiritual events determine what happens in the natural, and not vice versa. But because both realms are interfaced, events in one realm invariably affect the other.
I have written the majority of this from my experience. It is not exhaustive, and questions and contributions are welcome.