I turned to many books of lexicons (dictionaries) and collected every single word through which praise and appreciation could be expressed, in the hope that I might define "knowledge" using these words. However, I found it (knowledge) to be far above them all (meaning, I could not find any word that could truly define knowledge as it deserves). Consequently, I returned to the lexicon of intuition (Wijdan), and in its preface were these two words: "Man is not human without knowledge" (meaning, there is no difference between a human and an animal without knowledge).

(Al-Nawah fi Huqool al-Hayat: 52)