What is Prusha in the Hindu tradition of spirituality?
I assume by your question that you are actually referring to Purusha. Purusha is from Samkhya philosophy, which is one of the six schools of Hindu philosophy, but when discussing purusha prakriti must also be presented. Samkhya philosophy states that purusha and prakriti function in conjunction as the Divine energy of creation. Purusha is the core of consciousness and prakriti is the source of our material existence otherwise known as manifest consciousness. Purusha can be viewed as pure consciousness which is primordial, Absolute, eternal, uncaused, unsupported and immutable. It also is known as the static male energy underlying existence and in some cases is refered to as Shiva. Prakriti is the manifest consciousness or the world as we see it and is a reflection against the surface of purusha. Prakriti, like purusha is the eternal principle, but prakriti gives rise to a multiplicity of ephemeral forms. Prakriti can be viewed as relative, partial, continually changing, therefore is tr