God grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference.
He that will not apply new remedies must expect new evils; for time is the greatest innovator.
You must welcome change as the rule but not as your ruler.
Just when I think I have learned the way to live, life changes.
Life belongs to the living, and he who lives must be prepared for changes.
Johann Wolfgang von Goethe