Vaastu Shastra (वास्तु शास्त्र ) is a system of architecture which actually meant "Science of Architecture". Vaastu Shashtra are the theoretical version of Vaastu Vidya, the latter being the broader knowledge of occult theory about architecture and design from ancient India. Vaastu Vidya is a collection of ideas and concepts, with or without the support of layout diagrams, that are not rigid, rather these ideas and concepts are models for the organization of space and form within a building or group of buildings, based on their functions in relation to each other, their usage and to the overall fabric of the Vaastu. Ancient Vaastu Shashtra principles include those for the design of Mandir (Hindu temples), and the principles for the design and layout of houses, towns, cities, gardens, roads, waterworks, shops, and other public areas. Vaastu essentially deals with two energy sources i.e. the solar energy flux and geomagnetic energy flux. We cannot see energy with our naked eyes but we can realize and see its application in different forms. The aim is to control the flow of these energies by selecting proper direction and alignment and by understanding the directional energy flow one can easily relate north & south to geomagnetic organic flow & East & west are related to solar prank energy. Vaastu uses these forces of natural energies and aims to restore the balance between the home (the microcosm) and the cosmos (the macrocosm). If there were an imbalance between the directions or the energy flow, the resultant energy would be negative energy, which would then result in environmental aggression, creating disharmony among humans residing at that particular space.

More recently, studies conducted on geopathic stress have shown evidence of the relationship between people's well-being and natural energies. While negative energy can adversely affect the nervous system, the genetic code, and the immune system, positive energy can sustain our well-being, enhance our ability to counteract stressful situations, and increase our potential to succeed.