From now on, ending a sentence with a preposition is something up with which I will not put. – Sir Winston Churchill

A double negative is a no-no. – Author unknown

I believe that every English poet should read the English classics, master the rules of grammar before he attempts to bend or break them, travel abroad, experience the horror of sordid passion and — if he is lucky enough — know the love of an honest woman. – Robert Graves (1895–1985), lecture at Oxford, quoted in Time, 1961 Decembe