世界所有前进的动力都归功于那些不安分的人。幸福的人不可避免地把自己限制在古老的界限内。
The world owes all its onward impulses to men ill at ease. The happy man inevitably confines himself within ancient limits.
The best businesses are built on passion, not just profit.
To be a philosopher is not merely to have subtle thoughts, nor even to found a school, but so to love wisdom as to live according to its dictates.