A basic principle of ancient Chinese Feng Shui is that you should not sit with your back to a space. In other words, you need to have your back against a wall, not your face facing a wall. I believe there is a reason for this. When there is a space behind you, human instinct forces you to pay a subconscious attention on that space (we are very alert to danger from behind), making it harder to concentrate on what is in front of you.

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poplarsol 28 minutes ago | parent | next [-]

It's to stop the eunuchs from murdering you.

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nozzlegear 25 minutes ago | parent | prev [-]

What about having a window on the wall you're facing, so you can look out it?

	▲	tianqi 15 minutes ago \| parent [-]
		This principle emphasizes that there should be no space behind you. It has nothing to do with the wall or window in front of you. Those are just examples I used to explain according to the original post. If you're concerned about the window's position, ancient Feng Shui advised the window should be located to your side, specifically on the side of the hand you don't use for writing. I think their reasoning was: this way, your head and the hand you use for writing won't cast shadows on the area where you're writing.