“Chorus [leader]: Come now, ye men, in nature darkling, like to the race of leaves, of little might, figures of clay, shadowy feeble tribes, wingless creatures of a day, miserable mortals, dream-like men.”

tr. O'Neill 1938, Perseus http://www.perseus.tufts.edu/hopper/text.jsp?doc=Aristoph.+Birds+685
Birds, line 685-687
Birds (414 BC)

Aphorism 41
Novum Organum (1620), Book I
Context: The Idols of Tribe have their foundation in human nature itself, and in the tribe or race of men. For it is a false assertion that the sense of man is the measure of things. On the contrary, all perceptions as well of the sense as of the mind are according to the measure of the individual and not according to the measure of the universe. And the human understanding is like a false mirror, which, receiving rays irregularly, distorts and discolors the nature of things by mingling its own nature with it.

The Winter of Our Discontent (1961), unplaced by chapter

Source: Flowers for Algernon (1966)

(1945)

Pythian 8, line 95-8; pages 162-3. (446 BC)
Context: Creatures of a day! What is a man?
What is he not? A dream of a shadow
Is our mortal being. But when there comes to men
A gleam of splendour given of Heaven,
Then rests on them a light of glory
And blesséd are their days.

Source: Works and Days (c. 700 BC), line 109.

Marvin nodded. “Yet this ineffable and ungraspable quantity,” he replied, “this time which no man may possess, is in truth our only possession.”
Source: Mindswap (1966), Chapter 24 (p. 110)