People have long used poetry to describe the cultivation of students by teachers in obscurity.

Silkworms in spring will weave until they die, and candles will drain the wick every night.

People vividly compare teachers to "spring silkworms", which is a high evaluation of teachers' selfless dedication and noble quality. People praise candles because they burn themselves silently and illuminate others with their own light until they burn themselves out. Its metaphorical meaning is that when people talk about the quality of candles, they will think of their beloved teachers, who impart knowledge to students and illuminate their voyage with the light of wisdom and character. Isn't this selfless dedication to "light the way for others, let others light the way, let others see the light and burn themselves to glory" the most vivid metaphor for people's teachers?