“Trusting Merlin is like giving a migrant scorpion a lift inside your hat.”
Source: The Drawing of the Dark (1979), Chapter 14 (p. 183)
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Tim Powers 63
American writer 1952Related quotes

The 2,000 Year Old Man (and sequels)
“I trust everyone. I just don’t trust the devil inside them.”
“No, trust the Muse: she opes the good man's grave,
And lifts him to the gods.”
Book IV, ode viii
Translations, The Odes and Carmen Saeculare of Horace (1863)

“Trust people, until they give you a reason not to. And then never turn your back”
Source: The Longest Ride

Compare: "I saw you riding 'round in your brand new automobile/ Yes I saw you ridin' around, babe, in your brand new automobile/ Yes you was sitting there happy with your handsome driver at the wheel/ In your brand new automobile." Lightnin' Hopkins, Automobile Blues.
Song lyrics, Blonde on Blonde (1966), Leopard-Skin Pill-Box Hat

Source: Interview by Charlie Rose of Bloomberg - video https://video-kul1-1.xx.fbcdn.net/v/t42.3356-2/13862860_1329741163720893_1430621767_n.mp4/video-1469885440.mp4?vabr=114407&oh=bff4e8f9cedc225267e41ec705562dcf&oe=582E0B32&dl=0: 1 minute 53 seconds into the video