Both the spider and the silk worm spin silk. One day the spider said, "I admit your silk is better than the silk from the spider, your silk is both yellow and white, dazzling and bright. You use the silk that you spin yourself, to make a beautiful cocoon, then live inside thinking falsely you are kings.
In your little cocoon you wait until the women put you in scalding hot water and peel your silk off strand by strand. Then your beautiful cocoons are all gone. What a shame, though you have the ability to create such beauty, then die because of it, is this not stupid ?"
The silk worm thinking about what the spider said, answered, "Our actions are actually like suicide, but we spin silk so that people can weave beautiful brocades, giving all the people the ability to look beautiful, can you say our labor is a waste? Look at you spiders, all you weave for is to make a trap that will let you eat the cute little bugs that fly in. You don't regret it either but don't you think that is a little cruel?"
Many people think it's such a waste to do things that don't benefit them. These people cannot understand why would one sacrifice for the benefit of others. But on the other hand there are some people who are satisfied knowing that their sacrifices can benefit others. These people don't think their labors are stupid actions since they gain satisfaction not by bettering themselves but others.
So if we are not able to understand one's decision, don't despise, let's just respect it.
Zhongguo Gudai Yuyan Gushi (Ancient China Fable Stories)