True leadership in forestry means thinking beyond profits and considering the planet first.

The shale revolution has transformed the U.S. into a global energy leader.

无限的宽容必将导致宽容的消失。

Education is not preparation for life;education is life itself.

In the midst of winter, I found there was, within me, an invincible summer.

解读：一次性快乐稍纵即逝，如短暂刺激；可重复的快乐源于内心充实、自我成长，更值得投入精力，引导追求深度、持久快乐。