There is a classic Vedic story of an archery class in which Arjuna with his brothers and cousins are receiving instructions from the master archer, Drona. In a distant tree, Drona had placed a wooden bird onto which he had painted an artificial eye. He then asked each young man in succession to pull back an arrow but not release it until the student described what he was seeing. The first apprentice said that he saw the bird, the tree, the surrounding land, and the other students standing around him. Drona told him to put down the bow without launching the arrow. Each subsequent student responded similarly upon being asked the same question. When it was Arjunas turn, his response was,"All I see is the eye of the bird." When asked by Drona, "Don't you see the bird, the trees and the surrounding people?" Arjuna replied,"No Guru, all I can see is the eye." At this response, Drona instructed him to release the arrow, which struck a bull's eye.
(taken from the book Seven Spiritual Laws of Yoga by Deepak Chopra)