Is Sufism a belief? What do we mean by the word "belief'? It is the nature of mind to believe, and disbelief comes after. No unbeliever was born an unbeliever; for if a soul disbelieved from childhood he would never learn to speak. All the knowledge that man possesses he has acquired by belief. When he strengthens his belief by knowledge, then comes disbelief in things that his knowledge cannot cope with, and in things that his reason cannot justify. He then disbelieves things that he once believed in. An unbeliever is one who has changed his belief to disbelief; disbelief often darkens the soul, but sometimes it illuminates it.