And yes, there definitely are many good desires. For example, without the desire for food we would not stay alive. It is when our desire becomes an unquenchable craving or obsession, or causes us to do harm to ourselves or others, that it creates suffering and unhappiness. If you have ever been hurt because you tied your happiness or well-being to a person, place, opinion, self-identity, behavior, or goal, then you have firsthand experience of desire.
I must say a word about fear. It is life's only true opponent. Only fear can defeat life. It is a clever, treacherous adversary, how well I know. It has no decency, respects no law or convention, shows no mercy. It goes for your weakest spot, which it finds with unerring ease. It begins in your mind, always. One moment you are feeling calm, self-possessed, happy. Then fear, disguised in the garb of mild-mannered doubt, slips into your mind like a spy.
The great ideas of the West - rationalism, self-criticism, the disinterested search for truth, the separation of church and state, the rule of law, equality before the law, freedom of conscience, thought, and expression, human rights, and liberal democracy- quite an achievement, surely, for any civilization- - remain the best, and perhaps the only, means for all people, no matter of what race or creed, to reach their full potential and live in freedom.
All the seven deadly sins are self destroying, morbid appetites, but in their early stages at least, lust and gluttony, averice and sloth know some gratification, while anger and pride have power, even though that power eventually destroys itself. Envy is impotent, numbed with fear, never ceasing in its appetite, and it knows no gratification, but endless self torment. It has the ugliness of a trapped rat, which gnaws its own foot in an effort to escape.