This book is enormously helpful and very positive. The authors cite both Jung and Crowley to good effect, using illustrations from Crowley's Thoth deck.
Personal development focuses on using the Tarot as a guide to knowing yourself rather than divination or fortune telling. If something's going to happen that you need to know about, you'll have a premonition. You can get much more out of life by focusing on the here and now, than staying stuck in the past or worrying about the future.
Personal development with the Tarot, together with balanced spiritual practices, will help you use the religious and spiritual symbolism in the Tarot to grow out of past harm and into your true self.