Lope Felix de Vega Carpio ("Tome Burguillos") once said...
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,
"To-morrow we will open," I replied,
And when the morrow came I answered still, "To-morrow."