通过双重否定结构，强调了困难对于取得成就的必要性。
Work for a day, and you shall sleep for a night; work for a lifetime, and you shall sleep the sleep of happiness. - Da Vinci
When heaven gives a person a difficulty, it also gives them wisdom. - Yuli
Every small progress is slow and arduous; a person can only tackle one limited goal at a time. - Beferich
Suffering is a test, a tempering, a way to dig out the stains on one's soul by gritting one's teeth. - Ba Jin
Adversity can make a person smarter, but it cannot make them rich. - Tuffler
No great work is achieved without great difficulties. - Voltaire
As long as your backbone does not bend, there is no mountain you cannot carry. - Hong Zhanhui
Implementation is difficult, but it is the difficulty itself that attracts me. - Balzac
No great work is achieved without great difficulties. - Voltaire
Success equals hard work, the right methods, and little talk. - Einstein
A person must go through hard struggle to achieve something. - Andersen
Heroes often eat the bread of suffering and trials. - Romain Rolland
If you want to succeed, you must pay the price. - Emerson
What is a road? It is trampled out from where there is no road, and carved out from where there are only thorns. - Lu Xun
It is not being ignorant that is scary or harmful; what is scary and harmful is pretending to know when you do not. - Tolstoy
劳动一日，可得一夜安眠；勤劳一生，可得幸福的长眠。达芬奇
上天给人一份困难时，同时也给人一份智慧。雨栗
每一点滴的进展都是缓慢而艰巨的，一个人一次只能着手解决一项有限的目标。贝费里奇
受苦是考验，是磨炼，是咬紧牙关挖掉自己心灵上的污点。巴金
逆境可以使人变得更聪明，但不能使人变得富有。托富勒
不经巨大的困难，不会有伟大的事业。伏尔泰
只要脊梁不弯，就没有扛不起的山。洪战辉
实行起来是有困难的，但是吸引着我的，正是这个困难本身。巴尔扎克
不经巨大的困难，不会有伟大的事业。伏尔泰
成功等于艰苦的劳动、正确的方法和少谈空话。爱因斯坦
一个人必须经过一番刻苦奋斗，才会有所成就。安徒生
英雄常食苦难与试练的面包。罗曼·罗兰
凡事若要成功，必先付出代价。爱默生
什么是路？路是脚踏出来的，是荆棘中开辟出来的。鲁迅
不知道并不可怕，可怕的是不知道而伪装知道。托尔斯泰