Yoga is usually translated from Sanskrit as "union" or "to merge." Most people tend to think of yoga as a kind of physical exercise. Unfortunately, most people have come to think of yoga purely as physical asanas, which constitute only a very small part of the yogic system. The term "yoga" actually describes the state in which a person experiences oneness with the whole existence. Yogic practices are simply a method by which one prepares the body, mind and spirit to arrive at and exist in such a state. Yoga has its origins thousands of years ago, long before the first religions or belief systems were born.
Dhyana, in Sanskrit, essentially means meditation, and Linga means, the form. The first form is a Linga and the final form before dissolution is also a Linga. A Linga or perfect ellipsoid can be energized in various ways, to serve different purposes. It is one form that when energized, becomes a perennial storehouse of energy. The yogic science of making a Linga is based on this knowledge. Dhyanalinga is the distilled essence of yogic sciences, it is an outer manifestation of the peak form of inner energies.
In the Dhyanalinga, energy has been pushed to its highest point and locked through an intense process of prana prathistha¹. As Sadhguru describes it, the Linga form allows energy to be brought to the highest intensity at which it can still retain a form. Beyond that, it moves into formlessness.
The physical form of Dhyanalinga - the black granite stone - is just scaffolding for this energy form. Even if this were to be removed now, the energy form that exists there cannot be destroyed. It is eternally present and available to all.