Don Marquis (1878–1937), U.S. humorist, journalist. Quoted in E. Anthony, O Rare Don Marquis, ch. 6 (1962).
This aphorism emerged as the distillation of what had been a long piece on the futility of writing poetry for Don Marquis's "Sun Dial" column, which he rejected on the grounds of it being too much a plaint, publishing instead this one sentence. Full name is Donald Robert Perry Marquis.