数学家的工作永远不会完成；总有新的问题需要探索，新的谜团需要揭开。
A mathematician's work is never done; there are always new questions to explore and new mysteries to uncover.
I must study politics and war that my sons may have liberty to study mathematics and philosophy.
The voice of the sea is seductive, never ceasing, whispering, clamoring, murmuring, inviting the soul to wander in abysses of solitude.
"Every story is a journey, and every journey changes the traveler."
The great challenge of our time is to build institutions that can manage the complexity of modern societies.
