The father wanted to teach his four sons not to judge things too quickly. He sent each son to look at a pear tree in a different season. The first saw it bare in winter, the second budding in spring, the third in full bloom in summer, and the youngest heavy with fruit in fall. Each described only what they saw in their single season. The father explained that one cannot judge a tree or person based on one season alone, but must see the whole life through all the seasons to understand it fully.