句子使用了双重否定结构 'cannot... without'，强调了必要条件，比喻形象且通俗易懂。
Strong and rare characters are forged in this manner; hardship is often a stepmother, yet sometimes a kind mother; adversity gives birth to the strength of the soul and spirit; disaster is the nurse of pride, and calamity is the good milk of heroes. — Victor Hugo, Les Misérables
You cannot make good bread without sifting the flour! — Maxim Gorky, Mother
Life is a symphony; every moment of life is a combination of several choruses. (Romain Rolland, Jean-Christophe)
If life cannot do without lies, and life is a great illusion, it is because it is not true life. — Romain Rolland, Jean-Christophe
Wealth, benevolence, glory, genius, and the most bizarre quirks of behavior—all these provide rich fodder for curiosity or satisfy it; all are received with equal pleasure by people. — Alexander Pushkin, The Captive of the Caucasus
坚强、稀有的性格便是这样创造出来的;苦难，经常是后娘，有时却是也慈母;困苦能孕育灵魂和精神力量;灾难是傲骨的奶娘;祸患是豪杰的好乳汁。——雨果《悲惨世界》
没有筛过面粉是做不成好面包的!——高尔基《母亲》
生活是一阙交响乐，生活的每一时刻，都是几重唱的结合。(罗曼·罗兰《母与子》)
如果生活不能缺少谎话，生活是巨大的幻想，那是因为它不是真正的生活。——罗曼·罗兰《母与子》
财富、仁爱、光荣、天才、五花八门的奇行怪癖，这一切给好奇心提供了丰富的养料，或者使它得到满足，这一切被人们一视同仁地乐于接受。——普希金《彼得大帝的'黑奴》