The big window and sky represents how you see things. The people and the room are general population around you.
You saw something that didn't match up with what is normally anticipated. You see things differently.
You try to purvey these perceptions to the people who you want to know how you see things, but they don't understand, represented by the sudden appearance of clouds, which smear the view of the sky. This event may also be interpreted to mean that you have trouble conveying your thoughts to those important to you.
You further explore your perceptions, and engage in a vast and beautiful world filled with a mystique, represented by the night. The unrealistic aspect to it represents your more fantastical side, which makes mystical the normality of life.
Congratulations, you have reached a new level of personal insight.
Edit: Sorry, I thought you were an NF.
You further explore your perceptions yourself, revealing your more proactive nature, a determination to justify/prove/substantiate your world views. You find something beautiful in this discovery, though the touch of illusion means that you feel as if you aren't getting the full reality of the situation- you are skeptical.