I'm the reason your sound won't echo.

Learn how to tie a bowline knot. Practice in the dark. With one hand. For the rest of your life you’ll use this knot more times than you would ever believe.

艺术是一面照向社会的镜子，但也是一把塑造社会的锤子。

释义：圣人之所以成为圣人，关键在于内心纯粹地符合天理，而不在于才学和能力的大小。所以即使是平凡的人，只要愿意学习，使自己的内心纯粹地符合天理，那么也可以成为圣人。