The good thing about bad things is that they end. The bad things about good things is that they also end.
More Traditional Proverbs:
Many a man's nose was broken by his mouth.Traditional
Never kick a cow chip on a hot day
Traditional
The two hardest things to handle in life are failure success.
Traditional
Turn over a new leaf.
Traditional
Whoever is fond of cream should take the cow around with him.
Traditional
No one is worse, for knowing the worst of themselves.
Traditional