This is from an amazing interview Sarah E. Truman, the editor of ascent magazine, did with Astronaut Dr. Edgar Mitchell:
“In 1971, Navy Captain Dr. Edgar Dean Mitchell traveled on the Apollo 14 mission and became the sixth person to walk on the Moon. Instead of returning to Earth with moon rocks, Dr. Mitchell brought back a message of unity. While looking at the blue planet spinning outside his spacecraft window he experienced a transformative awakening and had a sense of the interconnectedness of all things.” ..
“EM: The experience in space was so powerful that when I got back to Earth I started digging into various literatures to try to understand what had happened. I found nothing in science literature but eventually discovered it in the Sanskrit of ancient India. The descriptions of samadhi, Savikalpa samadhi, were exactly what I felt: it is described as seeing things in their separateness, but experiencing them viscerally as a unity, as oneness, accompanied by ecstasy.” …
Full text at ascentmagazine.com