But getting back to old sayings, and I'm sure this one must have come up previously but this is the origin of:-
Don't catch your chickens before they hatch.
Apparently it is from one of Aesop's fables ............
The story tells of a young milkmaid who was on her way to the local market to sell a pail of milk that she was carrying around on the top of her head. Before even finding a buyer, the milkmaid was already thinking about what she would do with the money she would earn. Soon after, she accidently dropped the pail of milk on the ground, spilling it everywhere! With nothing left to sell, she returned home and told her mother about the disappointing news, to which her mother replied:
"Ah, my child," said the mother, "Do not count your chickens before they are hatched."