孔子说:“知之者,不如好之者;好之者,不如乐之者。”夸美纽斯在《大教学论》中有一个生动的比喻:“如果人们吃饭没有食欲,勉强地把食物吞到胃里去,其结果只能引起恶心和呕吐,至少也是消化不良,健康不佳,反之如果在饥饿感驱使下把食物吞到 Confucius said: “Known, not as good; good, not as happy.” Comenius in the “teaching theory” there is a vivid metaphor: "If people eat without appetite, reluctantly put food Swallowed the stomach, the result can only cause nausea and vomiting, at least indigestion, poor health, on the contrary if driven by hunger to swallow food