In the end, we are all alone, and that is the fundamental condition of human existence.

实现明天理想的唯一障碍是今天的疑虑。

The opening up of new markets, foreign or domestic, and the organizational development from the craft shop and factory to such concerns as U.S. Steel illustrate the same process of industrial mutation—if I may use that biological term—that incessantly revolutionizes the economic structure from within, incessantly destroying the old one, incessantly creating a new one.