"Buddhist psychology has developed a distinct system of classification. Rather than dividing thoughts into classes like "good" and "bad," Buddhist thinkers prefer to regard them as "skillful" versus "unskillful." An unskillful thought is one connected with greed, hatred, or delusion. These are the thoughts that the mind most easily builds into obsessions. They are unskillful in the sense that they lead you away from the goal of liberation."