Have Your Cake and Eat It Too

Etymology:

• This phrase originated in the 16th century. If you have a cake and you have eaten your piece, then you are left with a choice either to eat it more or save or keep it. In the same way, the spent money is the one, which is no longer in your possession, all you care would be the rest of money you have. The expression actually began as “you can’t eat your cake and have it too”.