"To write is to carve your soul into words and hope someone recognizes the shape."

If you want something you’ve never had, you must be willing to do something you’ve never done.

Global food security starts with local action and collaboration.

The saddest aspect of life right now is that science gathers knowledge faster than society gathers wisdom.

【讲解】：（教学生）不到他苦思冥想怎么也弄不明白的时候，不去开导他；不到他想说而又说不出来的时候，不去启发他。告诉他（四方形）的一个角，他不能由此推出另外三个角，就不再往下教他（新知识）了。