On a beautiful morning, an older gentleman, aged 75, was sitting with his son when he asked his son what was sitting in the window. He himself was not able to recognize what it was, due to his weak eyesight.

His son replied, "That is the crow."

Due to his age, the older man forgot and asked again.

His son again replied the same thing, "That is the crow."

This exchange continued for seven to eight times when, and at last, his son got annoyed and replied with anger, "Why are you asking the same thing again and again?"

The old man replied with tears in his eyes. "Son, don't get angry. When you were at the age of 4 years you asked me the same question 40 times and I never got angry