The heart exists at the level of the human soul rather than at the level of the animal soul. And unless the instinctual drives in the animal soul are confronted, they will confine -- and ultimately control -- the human soul and heart. One way that the instincts manifest themselves is in aggression. When getting what we want is blocked or frustrated, we often feel anger, hatred, and revenge. These feelings and our desire to express them can become powerful forces against our love of truth. We’re more interested in getting angry than in recognizing the truth, more interested in making somebody suffer than in inquiring into what's going on. These tendencies are driven by an instinctual force. Of course, fears are also involved because we're anxious about survival and anticipated losses.