Explain the concept of "samadhi" and its relationship to achieving spiritual mastery through meditation.

Samadhi is a state of consciousness achieved through deep meditation, in which the individual experiences a profound sense of oneness with the universe. It is often described as a state of complete absorption, where the individual loses all sense of self and becomes one with the object of their meditation. In the context of spiritual development, samadhi is seen as a highly desirable state, as it is believed to represent a level of spiritual attainment and realization that is beyond the reach of most ord....