“Generosity deserves generosity in return.”
~ Chapter 22 “The Name of the Wind” by Patrick Rothfuss.
You will not recognize a thankful person by their “Thank yous” or words of gratitude.
You will not recognize them by the quality of the precepts they promote.
You will identify them by their work to return benefits in like kind, benefits somewhat equal to or greater than the benefits they’ve received. That is thankfulness.
The thanks is revealed in the giving.