Do not let your fire go out, spark by irreplaceable spark.
不要让你的火焰熄灭，一点一点地，不可替代的火花。
We live in a world where the past is always present.
"Good research is about asking the right questions, not just applying fancy methods."
释义：跟交情浅的朋友说过深的话题，是愚蠢的；生活贫困的人总是希望得到富贵者的施舍，是糊涂的；没有取得他人的信任就进献忠言，会被误解为批评。
Every body continues in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed upon it.