我从十五岁开始致力于学习，三十岁便能自立于社会了，四十岁对各种事理不再迷惑不解，五十岁懂得了自然界的规律，六十岁对听到的事情能领会贯通，并能辨别是非真伪，七十岁时做事能随心所欲，但又不会超出礼法的规范。
The only way to do great work is to love what you do.
Sustainability is not just about the environment, it's about people.
"The only limit to our realization of tomorrow will be our doubts of today."
人心容易偏离正道，道心微妙难明，只有精研专一，才能持守中道。