There was a man who had four sons. He wanted his sons to learn not to judge
things too quickly. So he sent them each on a quest, in turn, to go and look at a pear tree that was a great distance away.
The first son went in the winter, the second in the spring, the third in summer, and the youngest son in the fall. When they had all gone and come back, he called them together to describe what they had seen.