I accept the principals of Feng Shui being practical while having a spiritual essence too. I used those principals with my home and the grounds. Honestly it has been years since I studied and applied that learning, so I do not remember all the philosophical points regarding Bagua areas and compass mapping for them. There are different styles with different principals. I followed the compass method when I did my home. I hired a consultant who guided me and gave me enough knowledge to begin the journey. I probably should refresh myself again as my home seems to need a tune-up kinda'. :-)
What is interesting is if you read the Sun Tzu and the art of War you will see those principals melding regarding application. Interesting and mind boggling too if given too much thought of least it was for myself. At task overall is as Akriti Mattu points out is the concept of freeing Energy in a manner that it is not hindered and flows. Feng Shui refers to that energy as 'Chi'.
One of the main principals I was taught regards clutter. When there is too much clutter then it hinders the flow of energy or bottles it up in one area. Kinda' like a gentle stream that gets damned up and does not flow the water can become stagnant. Other principals is the application of energy by elements. There are five - fire, wood, metal, earth, and water. They are to be balanced. In other words each offers different forms of energy affecting the environment and the person(s).
It is an interesting philosophy. It can become very complicated too. My suggestion is to trust your 'intent' and accept that Feng Shui itself is a means of 'helping' both the environment and the person(s). In other words one could over think it, which to me means the energy is not flowing. It gets bound up. Overall I think the philosophy and the principals of application can be a lot of fun while bringing a great sense of gratification too.