War is a tragedy, but sometimes necessary.
战争是一场悲剧，但有时是必要的。
持续经济增长的关键不是物质资本的积累，而是知识的积累。
The whole conviction of my life now rests upon the belief that loneliness, far from being a rare and curious phenomenon, peculiar to myself and to a few other solitary men, is the central and inevitable fact of human existence.
A writer is selected by his subject—his subject being the consciousness of his own era.