
Source: Epigrams, p. 345
Quoted by Max Beerbohm in Hebert Beerbohm Tree: Some Memories of Him and of His Art Collected by Max Beerbohm http://books.google.com/books?id=wM08AAAAIAAJ&q="A+man+never+knows+what+a+fool+he+is+until+he+hears+himself+imitated+by+one"&pg=PA312#v=onepage (1920).
Source: Epigrams, p. 345
“The fool doth think he is wise, but the wise man knows himself to be a fool.”
Touchstone, Act V, scene i
Source: As You Like It (1599–1600)
“The fool doth think he is wise, but the wise man knows himself to be a fool.”
Touchstone, Act V, scene i
Misattributed
“Nor is he the wisest man who never proved himself a fool.”
Stanza 124
Locksley Hall Sixty Years After (1886)
“The fool has one great advantage over a man of sense — he is always satisfied with himself.”
Napoleon : In His Own Words (1916)
This Business of Living (1935-1950)
“A fool boasts about what little he knows. A wise man keeps quiet about what he knows and is safe.”
Flowers of Wisdom
Discourse no. 6; vol. 1, p. 158.
Discourses on Art