The sense of smell in the animal is what intuition is to the human spirit. It tells you of the invisible, of what cannot be detected by any other means. It tells you the things that are not there, yet are coming. You see into the blind, opaque past and round the corner of time.
Songs and smells will bring you back to a moment in time more than anything else. It’s amazing how much can be conjured with a few notes of a song or a solitary whiff of a room. A song you didn’t even pay attention to at the time, a place that you didn’t even know had a particular smell.
Christ didn't say, "Love humanity as thyself," but, "Love thy neighbor as thyself," and do you know why? Because your neighbor, by definition, is the person nearby, the man sitting next to you in the underground who smells, perhaps, the man next to you in the queue who maybe tries to barge ahead of you; in short, your neighbor is the person who threatens your own liberty.