What goes up must come down.
More German Proverbs:
Summer sown corn and women's advice turn out once in every seven years.German
Don't throw away your dirty water till you have got clean.
German
Never fight an enemy whilst it is possible to cheat him.
German
Better envy than pity.
German
He who writes love letters must have clammy hands.
German
Nothing should be done in haste but gripping a flea.
German