From Destinypedia, the Destiny wiki
"Trust is a hell of a thing. Some people think they can earn it. Others think they can buy it. But that's the thing about trust: It's not real. You can't hold it, squeeze it, or put it in your pocket. It's intangible.
"You have to believe in it. I don't know about you, but I don't care much for fairy tales. I like real things that I can feel.
"This isn't to say I haven't used trust before. To get close. Close enough to use something real, that I can hold, squeeze, and tear 'em down to pocket size with.
"Up to you what you do with trust. We all have choices to make."
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