True wisdom lies in admitting one's ignorance.
The deepest need of man is the need to overcome his separateness, to leave the prison of his aloneness.
解决数学问题的过程往往比解决方案本身更重要。
衡量矿业公司成功的真正标准是它能否为后代留下积极的遗产。
过去从未死去,它甚至还未过去。