信心不是乐观或悲观，也不是性格属性。它是对积极结果的期待。

The photograph is literally an emanation of the referent. From a real body, which was there, proceed radiations which ultimately touch me, who am here.

大脑是一个经过自然选择的信息处理器。

上天安排我福分浅薄，我就培养高尚道德去迎接它；上天安排我身体劳顿，我就修炼精神安逸去弥补它；上天安排我遭遇艰危，我就努力实现政治理想去沟通它；上天安排我境况困苦，我就力求精神愉快去疏导它。

The most important property of a program is whether it accomplishes the intention of its user.

忧郁是悲伤中的幸福。

量子引力问题不仅是物理学的问题，也是科学哲学的问题。