Knowledge of vaastu will help the feng shui practitioner and energy worker. Once it is understood how cosmic energy flows in relation to the site, it will be possible to troubleshoot and predict and prevent health problems, misfortune, divorce or other sufferings before they manifest. One might ask how the site can affect one's health, happiness and fortune. Think for one moment about the documented disadvantages of living under or close to a huge electrical transformer. The bio-magnetic field of a plot when seriously disturbed by the addition of a structure is no less dangerous.
Cosmic energy enters the site from the Northeast.
The principles of vaastu are simple. Divine Energy enters the site from the Northeast and is directed towards the Southwest. It rises and splits. Half of it flows toward the Southeast, and half flows towards the Northwest before rising and flowing on towards the Southwest. The North east has a double positive current and the Southwest a double negative.