It's not supposed to be easy.Anyone who finds it easy is stupid.
赏析:指出灵巧的人和聪明的人往往会因为自己的才能而劳累和忧虑,而没有才能的人则没有太多的追求和烦恼。
A mathematician is a person who can find analogies between theorems; a better mathematician is one who can see analogies between theories and the best mathematician can notice analogies between analogies.