Scratch a Russsian, and you('ll) find a Tartar.文明不能改变本性.

Scratch me and I'll scratch you朋比为奸.

Scratch my back and I'll scratch yours.朋比为奸.

Second thoughts are best.三思而行，再思可也.

See, listen, and be silent, and you will live in peace.多看多听少多嘴，你会太平过日子.

Seeing is believing.眼见为实.

Seeing much, suffering much, and studying much are the three pillars of learning.见识多、遭难重，钻研深是学问的三大支持.

Seek the truth from facts.实事求是。

Seize (or Take) time by the forelock.撤热打铁.

Seldom seen, soon forgotten.见得少，忘得快.

Self do, self have.自食其果.

Self-confidence is the first requisite¹ to human greatness.人类的伟大，首要的是要有自信.

Self-control is courage under another form.自我克制是勇气的另一种形式。

Self-distrust is the cause of most of our failure.我们的失败多数是由于缺乏自信.

Self-praise is no recommendation.自我吹嘘，决不可取.

"Self-preservation is the first law of nature.

"人不为己，天诛地灭。

Self-reverence, self-knowledge, self-control, these three alone lead life to sovereign power.只要自重、自觉、自制，人生就可达到至高无上的境地.

Self-trust is the first secret of success.自信是成功的首要秘诀.

Selt-trust is the essence of heroism².自信是英雄的本色.

Send a wise man on an errand, and say nothing to him.智者当差，不用交代。

Serve somebody with the same sauce.以其人之道还治其人之身.

Set a beggar on horseback and he'll ride to the devil.小人得意，忘乎所以.

Set a thief to catch a thief.以毒攻毒.

Shallow streams make most din³.修养不深，高谈阔论.