This is a great book which will make you appreciate the true essence of Islamic Worship, will give you focus from moving away from THE OUTER rituals and focus on the inner dimensions of your worship with view to reforming yourself and make you a better believer of God. It is a short book from his mmonumental work "Ihya Uloom Id Din" ("Revival of the Religious Sciences") but yet with potential for high impact in your personal worship and connecting with God. Al Ghazali is a true genius of his time and works like this makes you understand why he was known as "Hajjat ul Islam" ("Proof of Islam") which was truely well earned. His work in general will help you understand Islam and its true essence for the benefit of your personal spiritual growth. Highly recommended!