数学的本质在于它的自由。
The essence of mathematics lies in its freedom.
专业人士其实就是能更优雅的从错误从回到正常状态的业余人士。
"Every moment is a memory in the making, and every memory is a moment lost."
你永远无法取悦所有人,所以不如做你自己。
Three grand essentials to happiness in this life are something to do, something to love, and something to hope for.