Your fellow man is your mirror. If your own face is clean, the image you perceive will also be flawless. But should you look upon your fellow man and see a blemish, it is your own imperfection that you are encountering - you are being shown what it is that you must correct within yourself.
Baal Shem TovPeople should allow themselves the opportunity to really know what the unity of God means. To grasp a part of the nondivisible union is to grasp the whole.
Baal Shem Tov