One mind-training slogan says, “Of the two witnesses, hold the principal one.” You’re the only one who knows what’s happening in your mind and intention. In fact, it is ourselves who should be most concerned about how we act, because we are most affected by our actions. When I was going into one of my first meditation retreats, I asked my father for some advice. He said, “How you act when you’re alone affects everything about the rest of your life.”
