True courage is not the absence of fear, but moving forward in the face of fear.
当没有人相信你时,你必须相信自己——这就是让你成为赢家的原因。
Men become civilized, not in proportion to their willingness to believe, but in proportion to their readiness to doubt.
每一个数学问题都是一个等待解决的谜题,每一个解答都是向理解现实结构迈进的一步。