“Chorus [of Birds]: Full of wiles, full of guile, at all times, in all ways, are the children of Men.”
tr. in Bartlett 1968, p. 91 http://books.google.com/books?q=inauthor%3A%22John+Bartlett%22+date%3A1968-1968+%22Full+of+wiles%2C+full+of+guile%2C+at+all+times%2C+in+all+ways%2C+are+the+children+of+Men%22 or Archive.org http://www.archive.org/stream/familiarquotatio017007mbp/familiarquotatio017007mbp_djvu.txt
Birds, line 451-452
Compare the earlier-written but later-known: "The heart is deceitful above all things, and desperately wicked", Jeremiah, 17:9 KJV Bible http://www.biblegateway.com/passage/?search=Jeremiah+17:9&version=9.
Birds (414 BC)
Help us to complete the source, original and additional information
Aristophanés 56
Athenian playwright of Old Comedy -448–-386 BCRelated quotes

“Life is only lived full-time by women with children.”

Source: Dictionary of Burning Words of Brilliant Writers (1895), p. 567
“All men are stupid. They are full of fear and insecurity—it makes them weak.”
Source: Drenai series, The King Beyond the Gate, Ch. 13
Context: And now I am going to tell you a great truth, and if you are wise, you will take it to your heart. All men are stupid. They are full of fear and insecurity— it makes them weak. Always the other man seems stronger, more confident, more capable. It is a lie of the worst kind, for we lie to ourselves... How do you know? You do not! You listened to the voice of your inadequacy, and because you believed, you are in my power. If I draw my sword, you are dead!

Selected writings of Shaheed Bhagat Singh (1986), p. 65
Context: I emphasize that I am full of ambition and hope and of full charm of life. But I can renounce all at the time of need, and that is the real sacrifice. These things can never be hinderance in the way of man, provided he be a man. You will have the practical proof in the near future.

1940s, Third inaugural address (1941)