Crystals can do all kinds of amazing work with Higher/Highest Thought, but they cannot learn, they cannot heal, they cannot keep records, and they cannot command an energy to become lesser or greater than its intended expression. "Then what good are they?" you ask. Take this little book home with you and spend a couple of hours reading it. Try the Light Show. Watch your crystal change and make pretty rainbows for you. After a couple of months, or maybe even weeks or days of working with your crystal, think about how your knowledge base has expanded. That's what good they are. And more.