What does Samadhi represent in yoga practice?

Samadhi is a significant concept in yoga that represents a state of deep absorption and union with the object of meditation, leading to a profound realization of the self. In yoga philosophy, particularly within the context of the eight limbs of yoga outlined in Patanjali's Yoga Sutras, samadhi is the ultimate goal of meditation practice. It is described as the stage where the practitioner transcends the duality of existence and experiences a oneness with the universe, resulting in spiritual enlightenment and an understanding of one’s true nature.

This state is characterized by a deep inner peace and clarity, where the mind is completely focused and free from distractions or fluctuations. The realization of self in samadhi encompasses not just awareness of one’s personal essence but also an integration with the larger cosmic principles, providing insights and transformative experiences that can lead to enlightenment.

In contrast, the other options refer to different aspects of yoga. The notion of physical exercise to improve flexibility relates to asana practice, while a historical text on yoga philosophy would pertain to scriptures like the Bhagavad Gita or the Upanishads. Lastly, the focus on breath control is associated with pranayama, which is an essential aspect of yoga practice but distinct from the meditative state of samadhi.