"Now, this pair," he waved the shoes he held, "are new. They haven’t been walked a mile, and for new shoes like these I charge a talent, maybe a talent and two." He pointed at my feet. "Those shoes, on the other hand, are used, and I don’t sell used shoes."
He turned his back on me and started to tidy his workbench rather aimlessly, humming to himself. It took me a second to recognize the tune: “Leave the Town, Tinker.”
I knew that he was trying to do me a favor, and a week ago I would have jumped at the opportunity for free shoes. But for some reason I didn’t feel right about it. I quietly gathered up my things and left a pair of copper jots on his stool before I left.
Why? Because pride is a strange thing, and because generosity deserves generosity in return. But mostly because it felt like the right thing to do, and that is reason enough."
Kvothe (The Name of the Wind by Patrick Rothfuss)