"Okay, so ... in order to live and move about on the earth, an angel needs to take a mortal vessel. A human being, basically, has to let the angel move into their body. They have to consent," he adds swiftly. "An angel can't take a vessel without their consent. And the, the thing is, an archangel is so powerful that most humans aren't strong enough to hold them without ... without being destroyed. So there were only a few people Lucifer could possibly use, when He was freed from his prison."
A beat.
"And His first choice was a friend of mine. Sam Winchester."
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"Okay, so ... in order to live and move about on the earth, an angel needs to take a mortal vessel. A human being, basically, has to let the angel move into their body. They have to consent," he adds swiftly. "An angel can't take a vessel without their consent. And the, the thing is, an archangel is so powerful that most humans aren't strong enough to hold them without ... without being destroyed. So there were only a few people Lucifer could possibly use, when He was freed from his prison."
A beat.
"And His first choice was a friend of mine. Sam Winchester."