FYI: If you would like an interesting read about playing "from the heart," then you might want to pick up By Heart: The Art of Memorizing Music. It is both practical and personal. The author, Paul Cienniwa, is a harpsichord player but don't let that turn you away. His thoughts on memorization are for everyone learning to play music from memory.
Thank you, Mr. Becks. I'm glad you find my book helpful!