The Chofetz Chaim zt’l was serving and caring for a guest who said, “I can take care of it myself. You don’t have to do this for me.”

“Really?” the Chofetz Chaim replied, “and will you also wear my tefillin for me tomorrow?”

Implying that since this was his mitzvah of Hachnasas Orchim, he wanted to perform the mitzvah properly. ~ R’ Elimelech Biderman Shlita