The most dangerous thing is to do nothing.
证明是一种用于使他人相信数学陈述为真的工具。
Psychology must be a science of life, not just of the laboratory.
In productive thinking, the transition from blind manipulation to understanding is crucial.
Most people are afraid of change,but if you look at it as something you can count on,then it can be a comfort.There's not many things you can really count on.