Updated: Dec 10, 2019
Perhaps the clearest definition of what Feng Shui means is envisioned by the historian, poet and writer of the Eastern Jin period.
Guo Pu （郭璞）【AD 276 - 324】wrote The Book of Burials （葬書）, the most authoritative source of Feng Shui doctrine that addresses the concept of Feng Shui in the history of China.
These lines are observed by all practitioners and form the basis of all Feng Shui applications.
This adaptation spells the criteria for the conditions of good Feng Shui.
Sources of Feng Shui originates and evolves into ‘winds’ （風）. Winds are air in motion created by a difference in pressures and moves from high to low.
The natural occurrence comes from the expansion of warmer atmosphere, thus allowing air to flow.
In Feng Shui, the quality of this flow must be gradual and sentimental. The origin of such qualities come from mountains （山）and hills which should be ideally lush and shaped with ridges. As the air brushes through the trees and minerals, it forms and carries with it the vital qualities of what mankind benefits as a breeze and can be further enhanced as wind （風）.
This flow will only stop when it meets with a collection of water （水）in a bright protected space. Preferably clean and moving, representing life, water is seen as a river, a protected channel, a reservoir, a lake, man made dams or a bay.
In urban cities, buildings and undulations of land make up for such sources while roads, drains, pools and ponds can take the place of natural water features.
It is from this quality of conditions that your Feng Shui Master comes in and lay out the possibilities of certain properties and land which will then be matched with the occupants for their enjoyment and benefits.
The point here is clear.