The Book of Knowledge is said to contain the entire Ihya. Imam al-Ghazali’s teachings and metaphors are presented in story form for children of any age, but are also suitable for the spiritual lives of both parents and teachers. Themes that are repeated to emphasize their importance in the 40 stories are concerned with: True Learning itself, the purpose of our brief lives, the Two Worlds, Trust in God’s Will, the polishing of the Spiritual Heart through self observation and correction, key virtues and harmful vices, and the responsibility of being a true teacher by putting one’s Knowledge into practice.