The affairs of this world are so shifting and depend on so many accidents, that it is hard to form any judgment concerning the future; nay, we see from experience that the forecasts even of the wise almost always turn out false.
Francesco GuicciardiniExperience has always shown, and reason also, that affairs which depend on many seldom succeed.
Francesco GuicciardiniBy numberless examples it will evidently appear that human affairs are as subject to change and fluctuation as the waters of the sea agitated by the winds.
Francesco Guicciardini