I Love This by Paulo Cohelo

A Warrior of Light knows that certain moments repeat themselves.
He often finds himself faced with the same problems and situations, and seeing these difficult situations return, he grows depressed, thinking that he is incapable of making any progress in life.

"I've been through all this before." He says to his heart

"Yes, you have been through all this before." replies his heart But you have never been beyond it!

Then the Warrior of Light realises that these repeated experiences have but one aim: To teach him what he does not want to learn...