[E]dged tools are dangerous things to handle, and not infrequently do much hurt. – Agnes Reppllier, “Wit and Humor,” 1892 [A bit of context here: “Wit is the salt

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

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

Good workmen never quarrel with their tools. – Lord Byron, Don Juan