What kind of writing technique did a woodcutter use? What's the good of writing like this?

Sharpening the knife does not delay the work of chopping wood. This was a commonly used idiom, which mainly used the writing technique of metaphor. Connecting the seemingly unrelated actions of sharpening the knife and chopping wood implied that as long as there was enough preparation and effort, one could be fully prepared before an important action and avoid cramming at the last minute, thus completing the task more efficiently. This kind of writing technique could let the readers feel the author's intention and foresight, increasing the reader's sense of immersion and trust. At the same time, it could also convey the author's understanding of the importance of action, encouraging the readers to take positive action to avoid procrastination and waste of time. In addition, this sentence also used the writing technique of causality to express the relationship between sharpening the knife and chopping wood. It implied that if one did not make preparations, they would not succeed in emphasizing the importance and necessity of action. In short, sharpening the knife will not delay the chopping of firewood. This sentence uses metaphor and causality to transform abstract concepts into concrete images, allowing readers to feel the logic and depth of the work, enhancing the literary and appeal of the work.