Make the doors upon a woman's wit, and it will out at the casement; shut that, and 'twill out at the keyhole; stop that, 'twill fly with the smoke out at the chimney. [ William Shakespeare, As You Like It, Act IV. Sc.1 ]

How oft my guardian angel gently cried, Soul, from thy casement look, and thou shalt see How he persists to knock and wait for thee! And, O! how often to that voice of sorrow, Tomorrow we will open, I replied. And when the morrow came I answered still, Tomorrow. [ Tome Burguillos ]