The master was asked a question concerning money by a young student
"Master, I do not understand money..."
"Give me five imperial credits."
"I have none. I work all day for enough coin to buy a little food and a place to sleep. I can never see any surplus. Yet many others live lives of ease and comfort. I cannot see the path they follow."
"I will loan it to you."
" Very well, I owe you five credits..."
"You owe 5.50 @10%. Do you now understand?"
"Very well, master!"