变体:有七个原因决定了所有人类的行动:机遇、本性、强迫、习惯、理性、激情和欲望。
The habit of reading is the only enjoyment in which there is no alloy; it lasts when all other pleasures fade.
The initial conditions of the universe are a profound mystery, and inflation offers a possible explanation for why the universe looks the way it does.