" A dwarf who can't get the hang of metal? That must be pretty unique."

"Pretty rare, sir. But I was quite good at alchemy.."

"Guild member?"

"Not any more, sir."

"Oh? How did you leave the guild?"

"Through the roof, sir. But I'm pretty certain I know what I did wrong. "

― Terry Pratchett , Feet of Clay (Discworld, #19; City Watch, #3)