You can see from the attitude of a person whether that person will prove to be your friend, or will end in being your enemy. You need not wait until the end, you can see at the first glance whether he is friendly inclined or not, because every person is music, perpetual music, continually going on day and night. Your intuitive faculty can hear that music, and that is the reason why one person is repellent and the other attracts you so much: it is the music he expresses. His whole atmosphere is charged with it.