“People are the most important things in this life. Treat them as something precious because that is exactly what they are. Just like our beautiful Planet, we are all insignificant compared to the vastness of the Universe. We are all essentially equal. We are not alone and isolated: when you hurt someone, you hurt yourself; when you help someone, you help yourself.”
Source: https://web.archive.org/web/20110811215758/http://www.marcospontes.com/curriculo/curriculo.htm Curriculum recovered on Internet Archive
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Marcos Pontes 4
Brazilian astronaut 1963Related quotes

1980s–1990s, Barbarians inside the Gates and Other Controversial Essays (1999)

“When you realize someone is trying to hurt you, it hurts less."
"Unless you love them.”
Source: The Transit of Venus

Interview at Collider.com (6 February 2011) http://collider.com/jennifer-beals-interview-the-chicago-code/74802/.

Will and Mary in Ch. 33 : Marzipan
His Dark Materials, The Amber Spyglass (2000)
Context: "When you stopped believing in God, did you stop believing in good and evil?"
"No. But I stopped believing there was a power of good and a power of evil that were outside us. And I came to believe that good and evil are names for what people do, not for what they are. All we can say is that this is a good deed, because it helps someone, or that's an evil one, because it hurts them. People are too complicated to have simple labels."