knowledge is power. 知识就是力量
two heads are better than one. 三个臭皮匠赛过一个诸葛亮
great minds think alike. 英雄所见略同
you can't judge a book by its cover. 人不可貌相，海水不可斗量
you can't make an omelet without breaking some eggs first. 有得必有失
a leopard can't change its spots. 江山易改本性难移
every cloud has a silver lining. 哪怕是坏的事情也会有它好的一面。塞翁失马焉知非福
the grass is always greener on the side of the fence. 这山望着那山高
the pen is mightier than the sword. 笔墨胜过刀剑。
you can lead/take a horse to water, but you can't make it drink.牵马到河边容易，逼马饮水难。
blood is thicker than water. 血浓于水
a friend in need is a friend indeed. 患难之交才是真朋友。
you'll cross that bridge when you come to it. 船到桥头自然直
actions speak louder than words.事实胜于雄辩
you've made your bed, now lie in it. 自食其果，自作自受
