昨日之日不可追，今日之日须臾期。
译文：过去的时间逝去了不可追回，今天的日子也会在转瞬之间过去。赏析：已经过去的就让它过去，不必再追悔。我们要活在当下，珍惜每一天。与其用泪水悔恨昨天，不如用汗水拼搏今天。
Nature is the best teacher; it has already done the experiments, we just have to interpret them.
All things are possible until they are proved impossible and even the impossible may only be so, as of now.
所以君子严于律己、宽以待人，而平庸的人却宽以待己、严于律人。
The study of complex systems has taught us that simple rules can give rise to incredibly complex behavior.