君子的学习，一定要喜欢提问。提问和学习是相辅相成的。不学习就无法产生疑问，不提问就无法扩展知识。
The world is the totality of facts, not of things.
You see, but you do not observe.
The only way to escape the mundane is to meticulously observe it.
食物的真正成本不仅是你商店里支付的，更是地球长期付出的代价。