In Samkhya philosophy, Prakriti is the fundamental principle that underlies all existence. It is the material cause of the universe and is responsible for its creation, maintenance, and dissolution.

The three gunas of Prakriti are Sattva, Rajas, and Tamas. Sattva is the quality of purity, goodness, and light. Rajas is the quality of passion, activity, and energy. Tamas is the quality of darkness, ignorance, and inertia.

In Samkhya philosophy, Purusha is the conscious principle and Prakriti is the material principle. Purusha is the witness or observer of Prakriti, while Prakriti is the object of Purusha's observation.

The goal of Samkhya philosophy is to gain knowledge of the true nature of reality. This knowledge is achieved through meditation and self-inquiry, which lead to the realization of the distinction between Purusha and Prakriti.

Kapila is considered the founder of Samkhya philosophy. He is said to have lived in the 6th century BCE and is credited with writing the Samkhya Karika, a foundational text of Samkhya philosophy.

The intellect (buddhi) is the instrument of knowledge in Samkhya philosophy. It discriminates between Purusha and Prakriti, and it is through the intellect that Purusha becomes aware of the world.

The ego (ahamkara) is responsible for creating the sense of individuality in Samkhya philosophy. It is through the ego that we experience ourselves as separate from the rest of the world.

The mind (manas) is the instrument of thought in Samkhya philosophy. It is through the mind that we are able to think, reason, and make decisions.

The senses (indriyas) are the instruments of perception in Samkhya philosophy. They allow us to perceive the world around us and to interact with it.

Action (kriya) is the source of all suffering in Samkhya philosophy. It is through action that we become attached to the world and to the fruits of our actions, which leads to suffering.

Knowledge (jnana) is the means to achieve liberation in Samkhya philosophy. It is through knowledge that we come to understand the true nature of reality and to realize our own true nature as Purusha.

Liberation (moksha) is the goal of Samkhya philosophy. It is the state of freedom from suffering and attachment to the world, and it is achieved through the realization of the true nature of reality.

Samkhya philosophy and Yoga philosophy are two different aspects of the same philosophy. Samkhya philosophy provides the theoretical framework for Yoga philosophy, while Yoga philosophy provides the practical methods for achieving liberation.

Samkhya philosophy has influenced the development of Buddhism, Jainism, and Vedanta. Its concepts of Purusha, Prakriti, and the three gunas have been adopted and adapted by these other Indian philosophies.