“The eyesight for an eagle is what thought is to a man.”

The Long Trail http://whitewolf.newcastle.edu.au/words/authors/K/KiplingRudyard/verse/volumeXI/longtrail.html, Stanza 5.
Other works
Context: There be triple ways to take, of the eagle or the snake,
Or the way of a man with a maid;
But the fairest way to me is a ship's upon the sea
In the heel of the North-East Trade.

As quoted in To Be Just Is to Love : Homilies for a Church Renewing‎ (2001) by Walter J. Burghardt, p. 214

Source: Invisible Man (1952), Chapter 5.

Act IV, scene i.
All Fools (1605)

"I Am a Rainworm", 1900, translated by J. Robbins, (J. Leftwich. Golden Peacock. Sci-Art, 1939, p. 83).

Note-Book of Anton Chekhov (1921)

The Day, 1906. Alle Verk, xii. 319.

By the Waters of Babylon (1937)
Context: I went fasting, as is the law. My body hurt but not my heart. When the dawn came, I was out of sight of the village. I prayed and purified myself, waiting for a sign. The sign was an eagle. It flew east.
Sometimes signs are sent by bad spirits. I waited again on the flat rock, fasting, taking no food. I was very still — I could feel the sky above me and the earth beneath. I waited till the sun was beginning to sink. Then three deer passed in the valley going east — they did not mind me or see me. There was a white fawn with them — a very great sign.

The facts and fancies of Mr. Darwin (1862)
Context: Though the large runt pigeon, with its massive beak and its huge feet, differs from its blue and barred progenitor the rock, it is a pigeon still. Though the slender Italian greyhound has a strange contrast with the short-legged bull-dog, they are both dogs in their teeth and in their skull. The mouse, even, has not been transmuted into the cat, nor the hen into the turkey, nor the duck into the goose, nor the hawk into the eagle, and still less the monkey into the man.