The propensity to truck， barter， and exchange one thing for another is common to all men， and to be found in no other race of animals.
In mathematics, the journey is just as important as the destination, for it is through the process of discovery that we truly learn.
The pace of change demands that we unlearn as much as we learn.
Never stop learning, because the world never stops changing.
真正的發(fā)現(xiàn)之旅不在于尋找新的風(fēng)景，而在于擁有新的眼光。