What is oceanic boundlessness?

The concept of "oceanic boundlessness" refers to a mystical sense of vastness and connectedness experienced during psychedelic sessions, particularly with substances like psilocybin. It represents a sense of being connected with the environment, other people, and even the universe, transcending the usual boundaries of individual experience. This state is characterized by a feeling of unity and immersion in the present moment that is typically devoid of a specific direction or attachment to a particular outcome. It's an essential aspect of the psychedelic experience and is associated with positive therapeutic outcomes, such as relief from major depression. This feeling is usually experienced during the peak of the psychedelic journey 1.