You can’t have your cake and eat it too.
More Spanish Proverbs:
No offense taken when none is meant.Spanish
No wonder if he breaks his head who stumbles twice over one stone.
Spanish
Let him who does not know you buy you.
Spanish
What I see with my eyes I can guess with my fingers.
Spanish
Never beg from one who was a beggar.
Spanish
Better is rule than rent.
Spanish