My excellent housekeeper becomes more inhospitable the older she grows. Every stranger is an object of suspicion to her. According to her own assertion, this disposition is the result of a long experience with human nature.
 Anatole France, The Crime of Sylvestre Bonnard (1881). copy citation

Context

“Give me my cravat, and go to the door; or, rather, go to the door first, and then, with the help of Heaven, you will give me my cravat. But please do not stand there between the clothes-press and the door like an old hack-horse between two saddles. ” My excellent housekeeper becomes more inhospitable the older she grows. Every stranger is an object of suspicion to her. According to her own assertion, this disposition is the result of a long experience with human nature. I had not the time to consider whether the same experience on the part of another experimenter would produce the same results. Maitre Mouche was waiting to see me in the ante-room.
Maitre Mouche is still more yellow than I had believed him to be.” source