Yes, yes, but now you are going into far more depth than the original quote. The idea behind the quote seems to have been (at least as I read it): "Be happy that you have feet, having feet is not something you should take for granted." The quote says nothing more than that. (Well, not quite. The point it makes is not only meant to be reserved for feet specifically, but rather seems to be meant as a comment on anything people take for granted.)