There once was a fisherman who lived in a little house by the ocean. He fished every day to feed his family. One day, he caught nothing except one small fish. "This isn't much," thought the fisherman, "but it's better than nothing."

The little fish hopped around in the net and cried out to the fisherman. "Please return me to the water!" he said. "I'm too small to be a good dinner. Someday, I'll be big and fat. You could catch me then and feed your family for a week!"

The fisherman listened as the fish spoke. He knew his family would love a big, fat fish. 

But he also knew that the ocean was very big. If he threw the fish back, he would never find it again.

"Little fish," he said, "I would be a fool to put you back. You'll only be a small meal for my family, but at least they will have food. I cannot feed them with silly dreams!"

Appreciate the small things that you have. Don't give them up to chase impossible things.
要学会欣赏你拥有的小的东西。不要放弃他们去追求不可能的事情。