The greatest obstacle to being heroic is the doubt whether one may not be going to prove one's self a fool; the truest heroism is to resist the doubt; and the profoundest wisdom, to know when it ought to be resisted, and when it be obeyed.
Science fiction is the literature of change.
当老人们种下他们知道自己永远不会坐在其下的树时,社会就会变得伟大。