Once, a king had announced that anyone who wanted the post of personal assistant must meet him.
Many people gathered in the palace.
The king led them to a pond and said, "Whoever will fill this pond's water in this pot will be chosen for the post. But remember, there is a hole in the pot."
So some people left without a single try. While some people tried for once and then said, "The king has already chosen someone else. Let's go."
But one man kept filling the pot with pond water patiently. He filled the water in the pot from the pond and came out on the ground.
But always within few moments, the water poured on the ground completely. He tried that uncountable numbers of times.
At last the pond became empty. The man found a diamond ring in the empty pond and he gave it to the king. At this the king said, "This ring is a reward for your patience and hard work. You are fit for the job."