That is what learning is. You suddenly understand something you've understood all your life, but in a new way.
我不是来取悦任何人的。
一年规划，没有比种植五谷更好的；十年规划，没有比种植树木更好的；终身规划，没有比培养人才更好的。
In productive thinking, the transition from blind manipulation to understanding is crucial.