使用了“Only when”引导的倒装句，增强了语气的肯定性和逻辑的严密性。
Opportunities are exceedingly rare, but they possess three essential conditions for success: legs that run like a deer, the leisure to stroll the streets, and the patience of a Jew. — Balzac
Every person's heart should hold two lights: one is the light of hope, and the other is the light of courage. With these two lights, we need not fear the darkness of the sea or the peril of the waves. — Roland
Without the aid of systematic knowledge, innate talent is powerless. Intuition can solve many problems, but not all. Only when genius and science are combined can the highest success be achieved. — Spencer
Failure and frustration await us, repeatedly casting a veil of sorrow over the face of youth, yet they also add a measure of dignity to the prospects of human life—something that no success can do. — Thoreau
Imagine the knowledge we have acquired as a large circle, but outside that circle lies so much emptiness, which for me means ignorance. Thus, I realize that there is still a vast amount I do not understand. — Einstein
机会往往极难得，但它具备三大成功的条件，那就是“像鹿一般会跑的腿，逛马路的闲功夫，和犹太人那样的耐性。——巴尔扎克
每人心中都应有两盏灯光，一盏是希望的灯光;一盏是勇气的灯光。有了这两盏灯光，我们就不怕海上的黑暗和风涛的险恶了。——罗兰
如果没有系统的知识的帮助，先天的才能是无力的。直观能解决很多事，但不是一切。天才和科学结合后才能得到最高的成功。——斯宾塞
失败和挫折等待着人们，一次又一次使青春的容颜蒙上哀愁，但也使人类生活的前景增添了一份尊严，这是任何成功都无法办到的。——梭罗
用一个大圆圈所学到的知识，但是圆圈之外是那么多的空白，对我来说就意味着无知。由此可见，我感到不懂的地方还大得很呢。——爱因斯坦