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.

我总是尽量保持积极，享受每一刻。

The most secure encryption is the one you don't use.

The essence of mathematics lies in its freedom.