>Do these have any specific meaning?
The 'kingdom of heaven' is within you, the 'holy spirit' is within you and what we call reality is a dreamlike illusion that we project outwards.
You have a non-physical 'third eye' which you can use to visualize thoughts and images which you call daydreams or nighttime dreams. What you visualize exists in the sense that you experience it, but it has no physical existence.
What we call 'real life' works in similar ways.
Most people can't wrap their minds around these concepts, so telling them 'this is what it means' usually doesn't work. They have to realize it somehow.
There are two possoble endgoals:
1) you stop thinking completely, meditate completely, the dream ends and you stop creating new dreams. Buddhists call that state Nirvana.
2) you volunteer to remain in the dreams forever, meditate deeply, stop thinking, reach nirvana, turn around andcome back to help others. Buddhists call that the bodhisattva path to enlightenment and buddhahood.
Because your thoughts create the world you must learn to control your thpughts. Meditation gives you a sort of on/off switch for the mind.
This may help
This may answer some of your questions about what you are
Always happy to help!