Read in winter night and show off your Song Gongzi: Lu You.

The ancients learned nothing, and it takes time to grow old.

What you get on paper is so shallow that you never know what you have to do.

Explanation:

The ancients spared no effort in learning, worked hard when they were young, and achieved nothing when they were old. After all, the knowledge gained from books is not perfect. If you want to know things thoroughly, you must practice it yourself.

2. How clear is the canal? Because there is inexhaustible living water for it.

Two Thoughts on Reading (Part One) Song: Zhu

Half an acre of square pond is like a mirror, crystal clear, and the sky and clouds are floating on the water.

Why is the water in the pond so clear? Because there is inexhaustible living water for it. (That pass: Where is it)

Explanation:

Half an acre of square pond is like a mirror, clear and bright, and the sky is shining and floating on the water. Why is the water in the pond so clear? It is because there is an inexhaustible source that continuously delivers living water to it.

I don't know the true face of Lushan Mountain, but I am only on this mountain.

Xilinqiang Song Dynasty: Su Shi

Looking at Lushan Mountain from the front and side of peaks and valleys, from far, near, high and low places, Lushan Mountain presents various faces.

I can't recognize the true face of Lushan Mountain because I am there.

Explanation:

Viewed from the side, Lushan Mountain is continuous and undulating, with different faces in terms of distance and height. The reason why I can't tell the true face of Lushan Mountain is because I am in Lushan Mountain.