We must not be afraid to be wrong, for only by being wrong can we learn and progress.
The only lies for which we are truly punished are those we tell ourselves.
儿童不仅在心理上是被动的，而且像一个空花瓶，是一个有待于充满及塑造的生命。
The world is full of willing people; some willing to work, the rest willing to let them.
The act of writing is an act of courage, to face the truths within and around us.
The essence of computational complexity is to understand the limits of what can be computed efficiently.
"The past is never dead; it’s not even past."