True wisdom is less presuming than folly. The wise man doubteth often, and changeth his mind; the fool is obstinate, and doubteth not; he knoweth all things but his own ignorance.

Akhenaten (d. 1336 BC) King of Egypt (1353-36 BC), religious reformer [Akhenaton, Akhnaten, Amenhotep IV, Ikhn-aton]

(Attributed)

Usually attributed to Akhenaten. Sometimes attributed as a writing of Noble Drew Ali (1886-1929), ostensibly from the Koran, or as an ancient Brahmin writing.