People often use "silkworms in spring will weave until they die". Praise the teacher with the poem "candles burn to ashes, tears dry to death" How to understand this?

Silkworms in spring will weave until they die, and candles will drain the wick every night. " The appearance of the two images is extremely intimate. "Spring Silkworm" is inherited naturally, compared with "Silkworm Spinning Silk" and "Wax Tears" skillfully, with the homonym of "silk" as "thinking" and "dying" as "doing everything" and "starting to do things". The witty sentences are natural and convey the unforgettable and unswerving feelings of children. Pain, passion and richness have become eternal famous sentences to express unwavering love. In addition, it also contains a more universal philosophy beyond the content of poetry itself: loyalty to work or career, selfless dedication. The whole sentence is affectionate and full of true feelings, meaningful and intriguing. Practical significance: Pursuing hopelessness, we still have to pursue in despair, so this pursuit is also pessimistic. These feelings seem to circulate endlessly, and it is difficult to find the end; It seems to have formed a multi-faceted solid, and light can't see the whole picture from one angle. As long as you persist in your pursuit and are willing to give everything, it is the whole meaning of doing anything.