Please choose one of the following things to give it symbolic meaning, and express your feelings through some of its characteristics (50 words): cicada, silkworm, lamp and grass sail.

Silkworms are called "silkworms will weave to death in spring, and candles will drain the wick every night", which symbolizes hard-working teachers who spit out all the ink in their bellies just to make students become useful people and make more contributions to the world. Silkworms spin cocoons and eventually become moths. Their lives are like a portrayal of teachers. Day and night, everything is for the growth and success of students. Always shine in the post, just like silk.