Book excerpt: The origin of Sufism -- Self criticism; Reflection; Privacy and seclusion; Heart; Hope or expectation; Asceticism. People follow the Sufi path when they sense that Islam has a deeper dimension. The resulting self-purification leads to this inner dimension of Islamic rituals, a deeper understanding of the Divine acts, and a greater knowledge and love of Him. After this, God draws the novice to Himself. With the help of a spiritual guide, the novice begins the life-long journey back to God. This continual process of spiritual development along a path of the innate human poverty, helplessness, and powerlessness before God is undertaken in the knowledge that everything comes from God. Each novice does what is necessary to grow spiritually, and God bestows the appropriate blessings and stations. "The highest aim of creation and its most sublime result is belief in God. The most exalted rank of humanity is knowledge of God. The most radiant happiness and sweetest bounty for jinn and humanity is love of God contained within the knowledge of God; the purest joy for the human spirit and the purest delight for the human heart is spiritual ecstasy contained within the love of God. Indeed, all true happiness, pure joy, sweet bounties, and unclouded pleasure are contained within the knowledge and love of God." And Sufism is the school where people can realise the highest aim of creation.