学不至于乐，不可谓之学。
学习应使人感到快乐，否则不能称之为真正的学习。
Safety isn't a cost; it's an investment in our most valuable resource—our people.
要理解现在，我们必须首先直面过去。
"The one thing that you have that nobody else has is you. Your voice, your mind, your story, your vision. So write and draw and build and play and dance and live as only you can."
生命中最美好的东西都是免费的。显然，我们最宝贵的资源是时间。
The earth's resources are finite, but human ingenuity is not.
The mind is a system of coordinated sensations.