Discuss the concept of ‘samadhi’ in Yoga Philosophy.

In Yoga philosophy, 'Samadhi' is the highest state of mental absorption and spiritual realization. It represents a profound union of the individual consciousness with the universal or divine consciousness. Samadhi is the eighth and final limb of Patanjali's Ashtanga Yoga, following the preceding stages of ethical principles, physical postures, breath control, and meditation.

Samadhi involves a state of deep concentration and contemplation, where the practitioner transcends the dualities of the material world, experiencing a sense of oneness with the ultimate reality. There are different stages or types of Samadhi, with the ultimate being 'Nirvikalpa Samadhi,' characterized by a complete absorption without any distinction between the meditator, the act of meditation, and the object of meditation.

In this state, the mind is utterly still, free from distractions and fluctuations. The practitioner achieves a state of bliss, realizing the interconnectedness of all existence. Samadhi is considered the culmination of the yogic journey, leading to self-realization and liberation (moksha) from the cycle of birth and death. It signifies the transcendence of individual ego and the merging of the self with the infinite, representing the pinnacle of spiritual attainment in Yoga philosophy.