The word “purusha” means man or masculine. What is referred to as the “purusha” is the cause, the main induction which sets things going. In yoga, we say that “shakti” is the “prakriti”, Shiva is the “purusha”. When we say “shakti”, we are referring to that energy which makes every atom work. This primordial energy is always identified as feminine. It is just lying there, throbbing, but it cannot do anything by itself. It needs this induction.
Today, scientific experiments have shown that if you take a state of vacuum, protons and neutrons are constantly springing up and going away, appearing and disappearing at random, without any particular direction. If you apply an electrical charge outside the vacuum, suddenly all these protons and neutrons start going with a certain pattern, in the form of an ellipse. So “prakriti” is just primordial energy. An outside charge happened. The moment it happened, everything started moving in an ellipsoid. Once the elliptical movement comes, it is the beginning of creation.