Spiritual Insights & Metaphysics of A Course in Mira...Understanding the metaphysics of A Course in Miracles (ACIM) is essential for being able to successfully apply them to upsets that arise in your life.Spiritual Insights & Metaphysics of A Course in Mira...Understanding the metaphysics of A Course in Miracles (ACIM) is essential for being able to successfully apply them to upsets that arise in your life.