Two Anthony De Mello quotes:

A village blacksmith found an apprentice willing to work hard at low pay. The smith immediately began his instructions to the lad: “When I take the metal out of the fire, I’ll lay it on the anvil; and when I nod my head you hit it with the hammer.” The apprentice did precisely what he thought he was told. Next day he was the village blacksmith.

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Those who make no mistakes are making the biggest mistake of all-they are attempting nothing new.