A story from Elder Renlund
Meet Lady.
Years ago our family had a little black dog, a toy poodle named Lady. Lady was smart, energetic, and great at fetching a ball. She was willing to retrieve a ball anytime, anyplace, and for as long as anyone was willing to throw one.
One day, after repeatedly throwing a ball for her to fetch, I decided to throw two balls at the same time, one blue and one yellow. Lady chased after the blue ball, picked it up, began running back to me, and then saw the yellow ball. She dropped the blue ball, dashed to the yellow ball, picked it up, and started back to me. Then she seemed to think of the blue ball, dropped the yellow ball, turned around, ran back to the blue ball, picked it up, and began returning.
As she was passing the yellow ball, she stopped, dropped the blue ball, picked up the yellow ball, and resumed running back. Then she dropped the yellow ball, turned around, scampered back to the blue ball, picked it up, and began running to me. As Lady passed the yellow ball again, she came to a screeching halt. She dropped the blue ball, looked back and forth from the blue ball to the yellow ball. Then she gave up, walked to her basket, and lay down.
For Lady, two balls were too many. She became confused, overwhelmed, and discouraged.

"The Renlunds' dog Lady"
