2 claims in “spirituality, consciousness studies”
The state of nirvikalpa samadhi (formless emptiness) accessible through meditation is different from but related to the experience of emptiness through psychedelic medicines; meditation emptiness is achieved through tightening concentration until one enters the space between thoughts, while psychedelic emptiness is accessed more directly.
According to Ram Dass's guru, LSD provides access to an astral analog of emptiness for a limited time (approximately two hours), while stabilized consciousness through meditation practices allows one to become the emptiness rather than visit it—making meditation practice more valuable for lasting transformation.