Many astronauts and cosmonauts alike have reported a strong sensation of euphoria and even a significant cognitive shift in their perspective on life, as well as themselves, once they saw the earth from a distance.
Many have explained it as an overwhelming sensation that everything in the universe is somehow connected, seeing national boundaries completely vanish coupled with the realization that our world is incredibly fragile.
It seems like quite a reasonable reaction as looking back at the earth from a distance must be an experience like none other.
What makes it so interesting is that it's not an isolated incident. Many people who have returned from space after looking back at our planet either from orbit or from the moon have explained the sensation in a very similar fashion.
Psychologists, neuroscientists, and physicians have all reported that many of these people have had a notable shift in their behavior and outlook on life and the world.
To end this post here's a quote from astronaut Edgar D Mitchell describing what he experienced upon seeing the Earth from the moon,
"You develop an instant global consciousness. A people orientation. An intense dissatisfaction with a state of the world and a compulsion to do something about it. From out there on the moon international politics looks so petty. You want to grab a politician by the scruff of their neck, and drag him a quarter of a million miles out and say look at that you son of a bitch."
Visuals by me, info by LEMMiNO