CALVIN: They say the world is a stage. But obviously the play is unrehearsed and everybody is ad-libbing his lines.

HOBBES: Maybe that’s why it’s hard to tell if we’re in a tragedy or a farce.

CALVIN: We need more special effects and dance numbers.

Bill Watterson (b. 1958) American cartoonist

Calvin and Hobbes (1993-12-11)
    (Source)

See Shakespeare.