A little boy and his grandfather were walking along a stream.
The boy said, proudly, that he knew the name of the bird sitting on the tree in front of them. The grandfather smiled and asked the boy, “What else do you know about it.” The boy couldn't answer.
The grandfather said that he knew, "without reading in any book, how the bird sings, how it flies, and what it eats." And he is never bored to see the bird again.
"How and where did you learn all this?" asked the boy.
"Observe it without the labels", said the grandfather.