We rest; A dream has power to poison sleep.
We rise; One wandering thought pollutes the day.
We feel, conceive, or reason; laugh or weep,
Embrace fond woe, or cast our cares away;
It is the same: for, be it joy or sorrow,
The path of departure still is free.
Man's yesterday may ne'er be like his morrow;
Nought may endure but mutability!

Autore: Mary Wollstonecraft Shelley