It is much more important to kill bad bills than to pass good ones.
Source, in full
Letter (6 September 1910) to his father, John Coolidge, who had been elected to the Vermont State Senate; in Your Son Calvin Coolidge, as cited in Silent Cal’s Almanack: The Homespun Wit and Wisdom of Vermont's Calvin Coolidge (2011), Ed. David Pietrusza, Bookbrewer, "Legislation".