别让恐惧阻挡你追逐梦想。
If you're not failing, you're not trying hard enough.
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.
The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.