A knotty piece of timber must have smooth wedges. – English proverb quoted by John Ray, 1670

Men have become the tools of their tools. – Henry David Thoreau, Walden

Are the tools without, which the carpenter puts forth his hands to, or are they and all the carpentry within himself; and would he not smile at the notion that chest or house is more than he? – C.A. Bartol, The Rising Faith, Chapter XI: Personality, 1873

The civil law cannot provide but by common measures… all their rules are made by as common a measure as they can, and they are the best rules that have the fewest exceptions: the best Carpenters make the fewest chips: but some there must be. – Jeremy Taylor, Ductor Dubitantium, or The Rule of Conscience, 1659