世界上最好和最美丽的东西是看不见甚至摸不着的——它们必须用心去感受。
A wise man said: before you speak, let your words pass through three gates. At the first gate, ask yourself, "Is it true?" At the second gate, ask "Is it necessary?" At the third gate, ask, "Is it kind?"
Success comes when preparation meets opportunity.
To understand psychology, observe behavior in its natural context.
In mathematics, the journey of discovery is as important as the destination.