The solution of a problem appears suddenly and is not approached by a gradual, step-by-step procedure.

【译文】来势像暴风骤雨一样猛烈，退去像微尘飘落一样静悄悄。长江的后浪推涌着前浪，世上的新人赶超着旧人。

"The desert teaches patience; the river teaches change."

数学中的合作是必不可少的；没有人能独自解决所有问题。