We are all ghosts of ourselves, haunting the places we once lived.
专注做自己擅长的事。
In the long history of humankind (and animal kind, too) those who learned to collaborate and improvise most effectively have prevailed.  
The fundamental impulse that sets and keeps the capitalist engine in motion comes from the new consumers' goods, the new methods of production or transportation, the new markets, the new forms of industrial organization that capitalist enterprise creates.
"Innocence is a kind of insanity."