The principle of recognizing different level of energy in regards to one's state of mind or attitude is nowadays quite popular, well-known and used by such a techniques like: Kinesiology (Muscle Testing), and Polarity to mention just two. Originally, however,  it was known and used in Dowsing for millenniums.

Dowsing was practiced as far back as 4,000 years B.C. In ancient cultures such as the Hebrews, Egyptians and Chinese would traditionally used dowsers (called Geomancer at that time) to find the best location for their houses, to heal sick body and soul, or to help with decision making process.

Over 90% of population today has high enough sensitivity to become a successful Dowser (in the1970’s only 75% of population had this ability). This rapid increase of number has a lot to do with energetic changes in Earth's own energetic field, what most of us recognize as a “Spiritual Awakening”. It does not matter if you are able to move pendulum from the very beginning or you will need time - it is only a matter of practice.