Summarize the following text. Blow, blow, thou winter wind, Thou art not so unkind As man's ingratitude; Thy tooth is not so keen, Because thou art not seen, Although thy breath be rude. Heigh-ho! sing heigh-ho! unto the green holly, Most friendship is feigning, most loving mere folly: Then heigh-ho, the holly! This life is most jolly. Freeze, freeze, thou bitter sky, That dost bite so nigh As benefits forgot: Though thou the waters warp, Thy sting is not so sharp As friend remembered not. Heigh-ho! sing heigh-ho! unto the green holly...