When should we interfere in the course of a stranger’s life? While philosophers have discussed at length extreme cases of assisting poor people in famine stricken countries, much less attention has been given to casual, everyday episodes. If I overhear two people discussing a place they are about to visit, and know that it is closed for renovation, should I interfere and tell them so? If I stand next to a customer who has not been given enough change in the (...) supermarket, should I point that out or mind my own business? Using the Kantian notions of love and respect, I answer such questions. I claim that Kant’s terminology is ill-suited for instructing us how to deal with others with whom we are personally involved, but is important for our encounters with strangers. I suggest that we take seriously Kant’s claim that we are “united in one dwelling place”. When around others, keep an open eye to the possibility that they might need help. If there is good reason to suppose that you may help, knock on their door. Let them decide whether they want to open it. They are totally entitled to decline the offer, but should keep in mind that it was given as part of the joint venture of living together with others. The interference should therefore not be regarded as an infringement of privacy. (shrink)