Ignorance is a form whose composition is of this world. When it advances, there is darkness; when it retreats, there is light. The bondsman vacillates with it as shadows vacillate with the sun. Have you not looked at man? Sometimes you find that he is ignorant of his own qualities and praises them, while he recognizes their faults in others and criticizes them. At other times you find that a person knows his own nature and criticizes it, while praising the same in others. He vacillates between protection and disappointment. If he encounters integrity and protection, he is correct. If he encounters lack of assistance and desertion, he errs. The key to ignorance is being satisfied with the knowledge one possesses, and placing all one's trust in it. The key to knowledge is the desire to exchange one level of knowledge for a higher level, together with divine grace and guidance. The lowest quality of an ignorant man is that he lays claim to knowledge which he does not deserve; his most common characteristic is ignorance of his own ignorance, and the most extreme aspect of his ignorance is to reject knowledge. There is nothing whose affirmation is the reality of its negation other that worldly ignorance and greed. All ignorant people are alike.