The Yoga School teaches that the ultimate goal of human life is to achieve self-realization and liberation from suffering. This can be achieved through the practice of yoga, which includes physical postures, breathing exercises, and meditation.

Patanjali is considered to be the founder of the Yoga School. He is believed to have lived in the 2nd century BCE and is the author of the Yoga Sutras, which is the foundational text of the Yoga School.

The central concept of the Yoga School is the eight limbs of yoga, which are a series of practices that lead to self-realization and liberation from suffering. The eight limbs are yama, niyama, asana, pranayama, pratyahara, dharana, dhyana, and samadhi.

The first limb of yoga is yama, which refers to the ethical observances that a yogi must follow. These observances include non-violence, truthfulness, non-stealing, non-sensuality, and non-possessiveness.

The second limb of yoga is niyama, which refers to the personal observances that a yogi must follow. These observances include purity, contentment, austerity, self-study, and surrender to God.

The third limb of yoga is asana, which refers to the physical postures that a yogi must practice. These postures are designed to improve flexibility, strength, and balance.

The fourth limb of yoga is pranayama, which refers to the control of breath. This practice is designed to calm the mind and promote relaxation.

The fifth limb of yoga is pratyahara, which refers to the withdrawal of the senses from external objects. This practice is designed to help the yogi focus on the inner world.

The sixth limb of yoga is dharana, which refers to the concentration of the mind on a single object. This practice is designed to help the yogi develop a deep state of focus.

The seventh limb of yoga is dhyana, which refers to the state of meditation. In this state, the yogi is completely absorbed in the object of meditation and experiences a deep sense of peace and tranquility.

The eighth limb of yoga is samadhi, which refers to the state of enlightenment. In this state, the yogi experiences a complete union with the divine and is liberated from all suffering.

The ultimate goal of the Yoga School is moksha, which refers to liberation from suffering and the cycle of rebirth. This is achieved through the practice of yoga, which leads to self-realization and the realization of the true nature of reality.

The Yoga School is considered to be one of the six orthodox schools of Indian philosophy, along with the Nyaya, Vaisheshika, Samkhya, Mimamsa, and Vedanta schools. These schools are considered to be orthodox because they accept the authority of the Vedas, the sacred texts of Hinduism.

The key text of the Yoga School is the Yoga Sutras of Patanjali. This text is a collection of 196 aphorisms that outline the philosophy and practice of yoga. Other important texts of the Yoga School include the Bhagavad Gita, the Upanishads, and the Vedas.

The Yoga School has influenced the development of other philosophical and spiritual traditions, such as Buddhism and Jainism. The concept of moksha, or liberation from suffering, is a central tenet of all three traditions. Additionally, the Yoga School's emphasis on meditation and self-realization has influenced the development of modern psychology and psychotherapy.